<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2023 Workiva-->
<!--r:d96e492f-574e-4207-9099-e58f6401a9de,g:0125f2e9-b606-41a9-9ada-05abe5adf968-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.xyleminc.com/role/RecentlyIssuedAccountingPronouncementsTextualsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#RecentlyIssuedAccountingPronouncementsTextualsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/RecentlyIssuedAccountingPronouncementsTextualsDetails" xlink:type="extended" id="id253cca09a0a498dba4c8810dc313f48_RecentlyIssuedAccountingPronouncementsTextualsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_94dcbf72-7b94-4113-a18c-3780f525708f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_PurchaseObligationSupplierFinanceProgramPaymentTermsOfInvoice_a60029ee-4134-4da4-9038-6d5bd459d6e7" xlink:href="xyl-20230630.xsd#xyl_PurchaseObligationSupplierFinanceProgramPaymentTermsOfInvoice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_94dcbf72-7b94-4113-a18c-3780f525708f" xlink:to="loc_xyl_PurchaseObligationSupplierFinanceProgramPaymentTermsOfInvoice_a60029ee-4134-4da4-9038-6d5bd459d6e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_PurchaseObligationSupplierFinanceProgramTerminationNoticeRequired_d844a314-1806-4a8d-9017-1659dd2ab782" xlink:href="xyl-20230630.xsd#xyl_PurchaseObligationSupplierFinanceProgramTerminationNoticeRequired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_94dcbf72-7b94-4113-a18c-3780f525708f" xlink:to="loc_xyl_PurchaseObligationSupplierFinanceProgramTerminationNoticeRequired_d844a314-1806-4a8d-9017-1659dd2ab782" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligation_a82196c8-0cec-4d9d-9fc1-be0c9a528499" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_94dcbf72-7b94-4113-a18c-3780f525708f" xlink:to="loc_us-gaap_PurchaseObligation_a82196c8-0cec-4d9d-9fc1-be0c9a528499" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_411616d3-6777-4130-9115-8f7e42765f49" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_94dcbf72-7b94-4113-a18c-3780f525708f" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_411616d3-6777-4130-9115-8f7e42765f49" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_7a6cc632-12e0-4093-8e76-fef0ffaa1cd7" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_411616d3-6777-4130-9115-8f7e42765f49" xlink:to="loc_srt_RangeAxis_7a6cc632-12e0-4093-8e76-fef0ffaa1cd7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_7a6cc632-12e0-4093-8e76-fef0ffaa1cd7_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_7a6cc632-12e0-4093-8e76-fef0ffaa1cd7" xlink:to="loc_srt_RangeMember_7a6cc632-12e0-4093-8e76-fef0ffaa1cd7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a648c7da-ff76-4121-b572-1217ec5c9803" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_7a6cc632-12e0-4093-8e76-fef0ffaa1cd7" xlink:to="loc_srt_RangeMember_a648c7da-ff76-4121-b572-1217ec5c9803" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_015fcd36-409f-4690-a99a-ae58ba33b9fc" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_a648c7da-ff76-4121-b572-1217ec5c9803" xlink:to="loc_srt_MinimumMember_015fcd36-409f-4690-a99a-ae58ba33b9fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_b141f3a6-3d5e-4fe7-a7a3-2196a88c810d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_a648c7da-ff76-4121-b572-1217ec5c9803" xlink:to="loc_srt_MaximumMember_b141f3a6-3d5e-4fe7-a7a3-2196a88c810d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/AcquisitionsandDivestituresTextualsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#AcquisitionsandDivestituresTextualsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/AcquisitionsandDivestituresTextualsDetails" xlink:type="extended" id="ibbc859bb0d4e471b822095f351b194d9_AcquisitionsandDivestituresTextualsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare_46eda76c-a598-43dd-861e-01d5f420148c" xlink:href="xyl-20230630.xsd#xyl_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_xyl_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare_46eda76c-a598-43dd-861e-01d5f420148c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_961eff9c-eeab-4802-baac-7df076f01b95" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_961eff9c-eeab-4802-baac-7df076f01b95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_ea875536-401b-4919-9194-9eba2430e6e5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_ea875536-401b-4919-9194-9eba2430e6e5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_a13fbe72-db30-4839-ba0d-defe703a0663" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_a13fbe72-db30-4839-ba0d-defe703a0663" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_9121d36b-715b-4418-90aa-58c054453127" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_9121d36b-715b-4418-90aa-58c054453127" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BusinessCombinationConsiderationTransferredLiabilitiesPaid_a7a907ab-09df-4b0a-81db-40e03d3469b7" xlink:href="xyl-20230630.xsd#xyl_BusinessCombinationConsiderationTransferredLiabilitiesPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_xyl_BusinessCombinationConsiderationTransferredLiabilitiesPaid_a7a907ab-09df-4b0a-81db-40e03d3469b7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_2ad84f9a-666a-400b-9e01-c1295330a4cc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_2ad84f9a-666a-400b-9e01-c1295330a4cc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_5eb640e4-d58a-4176-8b8e-139ec9c64228" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_5eb640e4-d58a-4176-8b8e-139ec9c64228" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BusinessCombinationConsiderationTransferredEquityInterestIssuedAndIssuableReplacementEquityAwards_00a84f9e-0f96-4475-9daa-19fa3576a9e8" xlink:href="xyl-20230630.xsd#xyl_BusinessCombinationConsiderationTransferredEquityInterestIssuedAndIssuableReplacementEquityAwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_xyl_BusinessCombinationConsiderationTransferredEquityInterestIssuedAndIssuableReplacementEquityAwards_00a84f9e-0f96-4475-9daa-19fa3576a9e8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_91cc2bc6-3571-4367-a812-f7cbf624d526" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_AccountsReceivableNet_91cc2bc6-3571-4367-a812-f7cbf624d526" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGross_a110d3ec-ebf3-479a-9fe9-6d3d7f6b8d92" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_AccountsReceivableGross_a110d3ec-ebf3-479a-9fe9-6d3d7f6b8d92" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_36a87715-4824-4207-8071-6ac8fbd5521f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_36a87715-4824-4207-8071-6ac8fbd5521f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_9426549c-4b3f-4f2d-9232-cf53d61bb4c7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_9426549c-4b3f-4f2d-9232-cf53d61bb4c7" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_ece809c5-0bea-46c6-bfbe-abcb5d73e3a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_Goodwill_ece809c5-0bea-46c6-bfbe-abcb5d73e3a4" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_d85a3951-0fbe-4ab3-8203-31b4f293c421" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_d85a3951-0fbe-4ab3-8203-31b4f293c421" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_d1184d4c-a5bf-442d-bd81-926f9dc60e85" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_d1184d4c-a5bf-442d-bd81-926f9dc60e85" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_f7a2ff0c-f2e3-4933-9d88-69194028858a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_f7a2ff0c-f2e3-4933-9d88-69194028858a" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_1671522a-28ac-4612-9711-09d2fedd3604" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_1671522a-28ac-4612-9711-09d2fedd3604" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_023af902-2ef4-4f54-b17e-a8f3d9ba694f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_023af902-2ef4-4f54-b17e-a8f3d9ba694f" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_e80efd74-0beb-40ef-b476-d2f1538d4a11" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_e80efd74-0beb-40ef-b476-d2f1538d4a11" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e6dd24df-4359-4c1c-b217-cadb9c96c8c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_bad6d846-fdad-46e0-b7f7-97e184a8d444" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e6dd24df-4359-4c1c-b217-cadb9c96c8c8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_57cfc0b3-45ac-47e4-bf14-31afc8c50004" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e6dd24df-4359-4c1c-b217-cadb9c96c8c8" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_57cfc0b3-45ac-47e4-bf14-31afc8c50004" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_57cfc0b3-45ac-47e4-bf14-31afc8c50004_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_57cfc0b3-45ac-47e4-bf14-31afc8c50004" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_57cfc0b3-45ac-47e4-bf14-31afc8c50004_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2bfd552d-59f8-4c39-b10b-7bcbab02b5e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_57cfc0b3-45ac-47e4-bf14-31afc8c50004" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2bfd552d-59f8-4c39-b10b-7bcbab02b5e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EvoquaAcquisitionMember_e73d0435-70ec-46d7-80e1-3688a11c9bcd" xlink:href="xyl-20230630.xsd#xyl_EvoquaAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2bfd552d-59f8-4c39-b10b-7bcbab02b5e8" xlink:to="loc_xyl_EvoquaAcquisitionMember_e73d0435-70ec-46d7-80e1-3688a11c9bcd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_bafd21a7-addd-4d5c-a09f-a7e07ea55413" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e6dd24df-4359-4c1c-b217-cadb9c96c8c8" xlink:to="loc_srt_OwnershipAxis_bafd21a7-addd-4d5c-a09f-a7e07ea55413" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_bafd21a7-addd-4d5c-a09f-a7e07ea55413_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_bafd21a7-addd-4d5c-a09f-a7e07ea55413" xlink:to="loc_srt_OwnershipDomain_bafd21a7-addd-4d5c-a09f-a7e07ea55413_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_9fdaf624-ca1b-41ae-aa1f-813abd18b8f7" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_bafd21a7-addd-4d5c-a09f-a7e07ea55413" xlink:to="loc_srt_OwnershipDomain_9fdaf624-ca1b-41ae-aa1f-813abd18b8f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_LegacyEvoquaStockholdersMember_f07142e4-5f6f-437f-b33d-015bb77a8241" xlink:href="xyl-20230630.xsd#xyl_LegacyEvoquaStockholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_9fdaf624-ca1b-41ae-aa1f-813abd18b8f7" xlink:to="loc_xyl_LegacyEvoquaStockholdersMember_f07142e4-5f6f-437f-b33d-015bb77a8241" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_LegacyXylemStockholdersMember_fd1c3397-869d-47f6-87c8-a4421a39858c" xlink:href="xyl-20230630.xsd#xyl_LegacyXylemStockholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_9fdaf624-ca1b-41ae-aa1f-813abd18b8f7" xlink:to="loc_xyl_LegacyXylemStockholdersMember_fd1c3397-869d-47f6-87c8-a4421a39858c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_3a0f5b21-2784-4d81-90c0-4ba168d7c1ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e6dd24df-4359-4c1c-b217-cadb9c96c8c8" xlink:to="loc_us-gaap_StatementClassOfStockAxis_3a0f5b21-2784-4d81-90c0-4ba168d7c1ce" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_3a0f5b21-2784-4d81-90c0-4ba168d7c1ce_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_3a0f5b21-2784-4d81-90c0-4ba168d7c1ce" xlink:to="loc_us-gaap_ClassOfStockDomain_3a0f5b21-2784-4d81-90c0-4ba168d7c1ce_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_6e74527a-db98-4435-8042-9df0265b65af" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_3a0f5b21-2784-4d81-90c0-4ba168d7c1ce" xlink:to="loc_us-gaap_ClassOfStockDomain_6e74527a-db98-4435-8042-9df0265b65af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockOptionMember_265a28c2-0876-4cf9-8cf3-99a1500760d7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_6e74527a-db98-4435-8042-9df0265b65af" xlink:to="loc_us-gaap_StockOptionMember_265a28c2-0876-4cf9-8cf3-99a1500760d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_427686df-b664-45d3-9cde-060bc6935c7b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_6e74527a-db98-4435-8042-9df0265b65af" xlink:to="loc_us-gaap_PerformanceSharesMember_427686df-b664-45d3-9cde-060bc6935c7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_ca1be50a-0867-48ae-9d3c-ba26e4b360fb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_6e74527a-db98-4435-8042-9df0265b65af" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_ca1be50a-0867-48ae-9d3c-ba26e4b360fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember_5f723beb-7831-4b9c-981f-07910da12cf8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockAppreciationRightsSARSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_6e74527a-db98-4435-8042-9df0265b65af" xlink:to="loc_us-gaap_StockAppreciationRightsSARSMember_5f723beb-7831-4b9c-981f-07910da12cf8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_76d0bdb6-d76e-41a5-a50f-7a4ec2b6a704" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e6dd24df-4359-4c1c-b217-cadb9c96c8c8" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_76d0bdb6-d76e-41a5-a50f-7a4ec2b6a704" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_76d0bdb6-d76e-41a5-a50f-7a4ec2b6a704_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_76d0bdb6-d76e-41a5-a50f-7a4ec2b6a704" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_76d0bdb6-d76e-41a5-a50f-7a4ec2b6a704_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_f741eb5c-6780-4bd3-8fd7-b3421a17d534" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_76d0bdb6-d76e-41a5-a50f-7a4ec2b6a704" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_f741eb5c-6780-4bd3-8fd7-b3421a17d534" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationsMember_bbcdd147-99c5-4ac1-998a-541cc1d60490" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_f741eb5c-6780-4bd3-8fd7-b3421a17d534" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationsMember_bbcdd147-99c5-4ac1-998a-541cc1d60490" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/AcquisitionsandDivestituresPurchasePriceAllocationDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#AcquisitionsandDivestituresPurchasePriceAllocationDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/AcquisitionsandDivestituresPurchasePriceAllocationDetails" xlink:type="extended" id="iab5b0dc2a5e046bd82dfb8488dee62a0_AcquisitionsandDivestituresPurchasePriceAllocationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_eaec715c-9082-480a-bb97-be90b47ae0c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_eaec715c-9082-480a-bb97-be90b47ae0c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_99d13eae-91b5-4899-ae0c-c48cbbb8d871" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_99d13eae-91b5-4899-ae0c-c48cbbb8d871" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_8baaffd3-13e8-4d93-8ec1-7d7c9b22703a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_8baaffd3-13e8-4d93-8ec1-7d7c9b22703a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_2cd25c1d-b72e-4605-9eb0-6e8896dd7557" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_2cd25c1d-b72e-4605-9eb0-6e8896dd7557" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsHeldForSale_fbeb1c90-3bb8-4524-8714-4b3afec948ad" xlink:href="xyl-20230630.xsd#xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsHeldForSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsHeldForSale_fbeb1c90-3bb8-4524-8714-4b3afec948ad" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_761ef59b-acea-4b2f-a2ad-60460746c9b2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_761ef59b-acea-4b2f-a2ad-60460746c9b2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_ca3201cf-c75c-4906-9eb8-3cdbeeed09c3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_Goodwill_ca3201cf-c75c-4906-9eb8-3cdbeeed09c3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_ed651e0f-624b-4fc7-95bf-26d5d220a847" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_ed651e0f-624b-4fc7-95bf-26d5d220a847" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_0e93ce76-a243-4969-b5ff-6703f0897b25" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_0e93ce76-a243-4969-b5ff-6703f0897b25" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssetsHeldForSale_d8884f6c-545d-4243-a3d3-eacc6a671413" xlink:href="xyl-20230630.xsd#xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssetsHeldForSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssetsHeldForSale_d8884f6c-545d-4243-a3d3-eacc6a671413" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_8e8a098f-5629-4a87-a9ed-c6ecb4787698" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_8e8a098f-5629-4a87-a9ed-c6ecb4787698" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt_91ff4fa1-a647-418b-b709-a0e473969b83" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt_91ff4fa1-a647-418b-b709-a0e473969b83" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedExpensesAndOtherLiabilities_f2a2e247-a1a6-48c0-8a43-444096cd17ac" xlink:href="xyl-20230630.xsd#xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedExpensesAndOtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedExpensesAndOtherLiabilities_f2a2e247-a1a6-48c0-8a43-444096cd17ac" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesHeldForSale_1403eea9-19d1-4b3a-8a89-4753fd8b785f" xlink:href="xyl-20230630.xsd#xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesHeldForSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesHeldForSale_1403eea9-19d1-4b3a-8a89-4753fd8b785f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_d266ff4e-5ef2-4fdd-b9f1-746c6eeafe3e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_d266ff4e-5ef2-4fdd-b9f1-746c6eeafe3e" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_02528d02-c2b6-4bf7-828f-a9ee22a47d9c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_02528d02-c2b6-4bf7-828f-a9ee22a47d9c" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_1ba732dd-8d72-46f6-b38d-2d8a9ee12bff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_1ba732dd-8d72-46f6-b38d-2d8a9ee12bff" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesHeldForSale_53c808f0-38d9-44f7-b8ec-20fb416aee47" xlink:href="xyl-20230630.xsd#xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesHeldForSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_xyl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesHeldForSale_53c808f0-38d9-44f7-b8ec-20fb416aee47" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_b280f09d-a081-46ca-895b-9e4f6dbff4f7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_b280f09d-a081-46ca-895b-9e4f6dbff4f7" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3e8c1bab-1871-4949-a7ef-ac7cd0e5bc37" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_b71ea4ca-c3ad-4c19-91ea-753ef44b6416" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3e8c1bab-1871-4949-a7ef-ac7cd0e5bc37" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_1e03d4fa-7537-461e-823e-16295def91e2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3e8c1bab-1871-4949-a7ef-ac7cd0e5bc37" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_1e03d4fa-7537-461e-823e-16295def91e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1e03d4fa-7537-461e-823e-16295def91e2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1e03d4fa-7537-461e-823e-16295def91e2" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1e03d4fa-7537-461e-823e-16295def91e2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6a0c0b10-2cca-4099-97d5-0cb02ecf499e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1e03d4fa-7537-461e-823e-16295def91e2" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6a0c0b10-2cca-4099-97d5-0cb02ecf499e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EvoquaAcquisitionMember_a7c15c6d-7018-4428-a65a-ecc129d4e482" xlink:href="xyl-20230630.xsd#xyl_EvoquaAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6a0c0b10-2cca-4099-97d5-0cb02ecf499e" xlink:to="loc_xyl_EvoquaAcquisitionMember_a7c15c6d-7018-4428-a65a-ecc129d4e482" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/AcquisitionsandDivestituresSummaryofIntangibleAsstsAcquiredDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#AcquisitionsandDivestituresSummaryofIntangibleAsstsAcquiredDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/AcquisitionsandDivestituresSummaryofIntangibleAsstsAcquiredDetails" xlink:type="extended" id="i04ad0a3118d0490ebff08a3e8052fe48_AcquisitionsandDivestituresSummaryofIntangibleAsstsAcquiredDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_9f148904-5a7f-41aa-872f-4044cd1f34f7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_9bfa1be6-51f0-4670-af46-839dc5fd69f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9f148904-5a7f-41aa-872f-4044cd1f34f7" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_9bfa1be6-51f0-4670-af46-839dc5fd69f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_bd2b2efd-734c-4941-9d57-6910cd41fcf5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9f148904-5a7f-41aa-872f-4044cd1f34f7" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_bd2b2efd-734c-4941-9d57-6910cd41fcf5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3cfc7d22-f830-496b-8f37-8bb10af88b18" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9f148904-5a7f-41aa-872f-4044cd1f34f7" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3cfc7d22-f830-496b-8f37-8bb10af88b18" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_ffb9af4c-7138-4c3e-b89c-75846e7a7272" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3cfc7d22-f830-496b-8f37-8bb10af88b18" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_ffb9af4c-7138-4c3e-b89c-75846e7a7272" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ffb9af4c-7138-4c3e-b89c-75846e7a7272_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_ffb9af4c-7138-4c3e-b89c-75846e7a7272" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ffb9af4c-7138-4c3e-b89c-75846e7a7272_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_fc9d8906-45ce-4343-8c57-20d11b1d9d90" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_ffb9af4c-7138-4c3e-b89c-75846e7a7272" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_fc9d8906-45ce-4343-8c57-20d11b1d9d90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EvoquaAcquisitionMember_a803f8dd-0ed5-4b65-a1a8-b8a1bffc98aa" xlink:href="xyl-20230630.xsd#xyl_EvoquaAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_fc9d8906-45ce-4343-8c57-20d11b1d9d90" xlink:to="loc_xyl_EvoquaAcquisitionMember_a803f8dd-0ed5-4b65-a1a8-b8a1bffc98aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_499e7023-7896-4a69-981f-b96c55bbdff7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3cfc7d22-f830-496b-8f37-8bb10af88b18" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_499e7023-7896-4a69-981f-b96c55bbdff7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_499e7023-7896-4a69-981f-b96c55bbdff7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_499e7023-7896-4a69-981f-b96c55bbdff7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_499e7023-7896-4a69-981f-b96c55bbdff7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1f0e6ddc-502d-49b2-984a-5cf0d0cde91f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_499e7023-7896-4a69-981f-b96c55bbdff7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1f0e6ddc-502d-49b2-984a-5cf0d0cde91f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksMember_c71a7bd0-a1ac-4678-97f7-4b8eb4aa3058" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1f0e6ddc-502d-49b2-984a-5cf0d0cde91f" xlink:to="loc_us-gaap_TrademarksMember_c71a7bd0-a1ac-4678-97f7-4b8eb4aa3058" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_8e28f65e-63f3-406a-8035-117b4b64c53a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TechnologyBasedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1f0e6ddc-502d-49b2-984a-5cf0d0cde91f" xlink:to="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_8e28f65e-63f3-406a-8035-117b4b64c53a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_16bb5c78-5599-4fe1-abca-9c45f92de8e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1f0e6ddc-502d-49b2-984a-5cf0d0cde91f" xlink:to="loc_us-gaap_CustomerRelationshipsMember_16bb5c78-5599-4fe1-abca-9c45f92de8e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OrderOrProductionBacklogMember_30f6d307-c5bb-45c5-8670-d22b3569cd1d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OrderOrProductionBacklogMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1f0e6ddc-502d-49b2-984a-5cf0d0cde91f" xlink:to="loc_us-gaap_OrderOrProductionBacklogMember_30f6d307-c5bb-45c5-8670-d22b3569cd1d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_34dd161e-a748-4934-983b-76b7e74d63e2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1f0e6ddc-502d-49b2-984a-5cf0d0cde91f" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_34dd161e-a748-4934-983b-76b7e74d63e2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_8fe52f71-652f-4cbb-a0ea-88f76244ba9c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_3cfc7d22-f830-496b-8f37-8bb10af88b18" xlink:to="loc_srt_RangeAxis_8fe52f71-652f-4cbb-a0ea-88f76244ba9c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_8fe52f71-652f-4cbb-a0ea-88f76244ba9c_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_8fe52f71-652f-4cbb-a0ea-88f76244ba9c" xlink:to="loc_srt_RangeMember_8fe52f71-652f-4cbb-a0ea-88f76244ba9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_cb97df09-939e-4afe-a23c-ca1da3f77e37" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_8fe52f71-652f-4cbb-a0ea-88f76244ba9c" xlink:to="loc_srt_RangeMember_cb97df09-939e-4afe-a23c-ca1da3f77e37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_8894ca17-52ed-47ea-b3f3-d5d5a6089e87" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_cb97df09-939e-4afe-a23c-ca1da3f77e37" xlink:to="loc_srt_MinimumMember_8894ca17-52ed-47ea-b3f3-d5d5a6089e87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d413c9d8-b49a-4e43-8b05-2713deef08e3" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_cb97df09-939e-4afe-a23c-ca1da3f77e37" xlink:to="loc_srt_MaximumMember_d413c9d8-b49a-4e43-8b05-2713deef08e3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/AcquisitionsandDivestituresSummaryofProFormaInformationDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#AcquisitionsandDivestituresSummaryofProFormaInformationDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/AcquisitionsandDivestituresSummaryofProFormaInformationDetails" xlink:type="extended" id="i5ca13b3338244f4b82c692055507f55c_AcquisitionsandDivestituresSummaryofProFormaInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_71ca920d-6da4-4f90-aa56-83197b4705f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_ea5c7260-cb61-4d14-986a-5a8397bfd461" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_71ca920d-6da4-4f90-aa56-83197b4705f8" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_ea5c7260-cb61-4d14-986a-5a8397bfd461" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_85805dc5-4fe9-475b-b1d6-6ee4cf17cc8d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_71ca920d-6da4-4f90-aa56-83197b4705f8" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_85805dc5-4fe9-475b-b1d6-6ee4cf17cc8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_97299ec6-7129-4075-bc0f-3325d5095cf0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_71ca920d-6da4-4f90-aa56-83197b4705f8" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_97299ec6-7129-4075-bc0f-3325d5095cf0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_593989dc-7ca2-4702-a2a8-f84677b8f67d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_97299ec6-7129-4075-bc0f-3325d5095cf0" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_593989dc-7ca2-4702-a2a8-f84677b8f67d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_593989dc-7ca2-4702-a2a8-f84677b8f67d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_593989dc-7ca2-4702-a2a8-f84677b8f67d" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_593989dc-7ca2-4702-a2a8-f84677b8f67d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_d2dffc19-f389-4381-af0b-3eb01337dfb5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_593989dc-7ca2-4702-a2a8-f84677b8f67d" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_d2dffc19-f389-4381-af0b-3eb01337dfb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EvoquaAcquisitionMember_af95437e-71c4-4e31-9eb9-703d325f1c3c" xlink:href="xyl-20230630.xsd#xyl_EvoquaAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_d2dffc19-f389-4381-af0b-3eb01337dfb5" xlink:to="loc_xyl_EvoquaAcquisitionMember_af95437e-71c4-4e31-9eb9-703d325f1c3c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/AcquisitionsandDivestituresDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#AcquisitionsandDivestituresDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/AcquisitionsandDivestituresDetails" xlink:type="extended" id="i2b9bb11ab9ed41a28880344444adfd78_AcquisitionsandDivestituresDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_53590b86-8d7b-4b93-b400-985b6c92c69a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_e03dd5a2-1090-494c-829b-5e26ac5948fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_53590b86-8d7b-4b93-b400-985b6c92c69a" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_e03dd5a2-1090-494c-829b-5e26ac5948fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BusinessCombinationConsiderationTransferredEquityInterestIssuedAndIssuableReplacementEquityAwards_c3cddee1-1f48-4370-bfe4-4b0bf2761749" xlink:href="xyl-20230630.xsd#xyl_BusinessCombinationConsiderationTransferredEquityInterestIssuedAndIssuableReplacementEquityAwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_53590b86-8d7b-4b93-b400-985b6c92c69a" xlink:to="loc_xyl_BusinessCombinationConsiderationTransferredEquityInterestIssuedAndIssuableReplacementEquityAwards_c3cddee1-1f48-4370-bfe4-4b0bf2761749" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BusinessCombinationConsiderationTransferredLiabilitiesPaid_21d41597-e202-410b-a74d-77b63dfbebb3" xlink:href="xyl-20230630.xsd#xyl_BusinessCombinationConsiderationTransferredLiabilitiesPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_53590b86-8d7b-4b93-b400-985b6c92c69a" xlink:to="loc_xyl_BusinessCombinationConsiderationTransferredLiabilitiesPaid_21d41597-e202-410b-a74d-77b63dfbebb3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_629faade-b717-446b-b0da-2bc98eecf6ea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_53590b86-8d7b-4b93-b400-985b6c92c69a" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_629faade-b717-446b-b0da-2bc98eecf6ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_f3512033-2879-4bc3-bdf1-8d43c43bff15" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_53590b86-8d7b-4b93-b400-985b6c92c69a" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_f3512033-2879-4bc3-bdf1-8d43c43bff15" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_73ed18c1-efe0-4e16-8e11-b315e8dcb578" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_f3512033-2879-4bc3-bdf1-8d43c43bff15" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_73ed18c1-efe0-4e16-8e11-b315e8dcb578" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_73ed18c1-efe0-4e16-8e11-b315e8dcb578_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_73ed18c1-efe0-4e16-8e11-b315e8dcb578" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_73ed18c1-efe0-4e16-8e11-b315e8dcb578_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b222c4bc-69c3-4efe-8213-7f5f5e938754" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_73ed18c1-efe0-4e16-8e11-b315e8dcb578" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b222c4bc-69c3-4efe-8213-7f5f5e938754" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EvoquaAcquisitionMember_09e62a8a-f35b-4a6a-85cc-7b9175a2c1bc" xlink:href="xyl-20230630.xsd#xyl_EvoquaAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b222c4bc-69c3-4efe-8213-7f5f5e938754" xlink:to="loc_xyl_EvoquaAcquisitionMember_09e62a8a-f35b-4a6a-85cc-7b9175a2c1bc" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/RevenueDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#RevenueDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/RevenueDisaggregationofRevenueDetails" xlink:type="extended" id="i8c63a6755db74030b21197e4d6bd48fe_RevenueDisaggregationofRevenueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_0d71d2a8-8622-4ff0-842a-73222a0bc695" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_f128972a-ea18-4b76-ab4e-800697529630" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_0d71d2a8-8622-4ff0-842a-73222a0bc695" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_f128972a-ea18-4b76-ab4e-800697529630" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_OtherRevenues_c4745b9c-d152-4385-beae-4f33bac76029" xlink:href="xyl-20230630.xsd#xyl_OtherRevenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_0d71d2a8-8622-4ff0-842a-73222a0bc695" xlink:to="loc_xyl_OtherRevenues_c4745b9c-d152-4385-beae-4f33bac76029" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_021bb1e4-acf2-4970-8de0-d9c9290020fe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_0d71d2a8-8622-4ff0-842a-73222a0bc695" xlink:to="loc_us-gaap_Revenues_021bb1e4-acf2-4970-8de0-d9c9290020fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_4db70fbe-0bab-402f-94d5-6d037f64eb75" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_0d71d2a8-8622-4ff0-842a-73222a0bc695" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_4db70fbe-0bab-402f-94d5-6d037f64eb75" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_3eca6cb1-3ca5-46e6-9b8b-62ed197c726c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_4db70fbe-0bab-402f-94d5-6d037f64eb75" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_3eca6cb1-3ca5-46e6-9b8b-62ed197c726c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_3eca6cb1-3ca5-46e6-9b8b-62ed197c726c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3eca6cb1-3ca5-46e6-9b8b-62ed197c726c" xlink:to="loc_us-gaap_SegmentDomain_3eca6cb1-3ca5-46e6-9b8b-62ed197c726c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_bc98d8b9-84d8-454c-9dab-6e11d91662b6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3eca6cb1-3ca5-46e6-9b8b-62ed197c726c" xlink:to="loc_us-gaap_SegmentDomain_bc98d8b9-84d8-454c-9dab-6e11d91662b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_6958cf48-817e-4d3f-844e-b64c8bffac68" xlink:href="xyl-20230630.xsd#xyl_WaterInfrastructureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bc98d8b9-84d8-454c-9dab-6e11d91662b6" xlink:to="loc_xyl_WaterInfrastructureMember_6958cf48-817e-4d3f-844e-b64c8bffac68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_f63a2c44-71d7-4420-8e8f-620cf313d281" xlink:href="xyl-20230630.xsd#xyl_AppliedWaterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bc98d8b9-84d8-454c-9dab-6e11d91662b6" xlink:to="loc_xyl_AppliedWaterMember_f63a2c44-71d7-4420-8e8f-620cf313d281" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_1676461a-0c96-4740-b55c-67137b0c861d" xlink:href="xyl-20230630.xsd#xyl_MeasurementandControlSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bc98d8b9-84d8-454c-9dab-6e11d91662b6" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_1676461a-0c96-4740-b55c-67137b0c861d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_IntegratedSolutionsServicesMember_582b3b1e-9005-429d-ac76-f97db1426caa" xlink:href="xyl-20230630.xsd#xyl_IntegratedSolutionsServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bc98d8b9-84d8-454c-9dab-6e11d91662b6" xlink:to="loc_xyl_IntegratedSolutionsServicesMember_582b3b1e-9005-429d-ac76-f97db1426caa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_4a46e3fc-f120-4002-a0c6-c0ac2e8a881f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_4db70fbe-0bab-402f-94d5-6d037f64eb75" xlink:to="loc_srt_ProductOrServiceAxis_4a46e3fc-f120-4002-a0c6-c0ac2e8a881f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_4a46e3fc-f120-4002-a0c6-c0ac2e8a881f_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_4a46e3fc-f120-4002-a0c6-c0ac2e8a881f" xlink:to="loc_srt_ProductsAndServicesDomain_4a46e3fc-f120-4002-a0c6-c0ac2e8a881f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_36b2a9f7-1407-4d45-8aa1-9becc42a755f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_4a46e3fc-f120-4002-a0c6-c0ac2e8a881f" xlink:to="loc_srt_ProductsAndServicesDomain_36b2a9f7-1407-4d45-8aa1-9becc42a755f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_TransportMember_86294157-2171-4088-9f39-db13cedfc5c4" xlink:href="xyl-20230630.xsd#xyl_TransportMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_36b2a9f7-1407-4d45-8aa1-9becc42a755f" xlink:to="loc_xyl_TransportMember_86294157-2171-4088-9f39-db13cedfc5c4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_TreatmentMember_3ef95afe-feb8-4f39-865c-76488961c5c9" xlink:href="xyl-20230630.xsd#xyl_TreatmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_36b2a9f7-1407-4d45-8aa1-9becc42a755f" xlink:to="loc_xyl_TreatmentMember_3ef95afe-feb8-4f39-865c-76488961c5c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_IndustrialWaterMember_d674fc12-5c13-4710-acb0-88f9a10edb0a" xlink:href="xyl-20230630.xsd#xyl_IndustrialWaterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_36b2a9f7-1407-4d45-8aa1-9becc42a755f" xlink:to="loc_xyl_IndustrialWaterMember_d674fc12-5c13-4710-acb0-88f9a10edb0a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryWaterMember_640ed8ce-a96b-44c8-be2f-7e5ef52fe66e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PublicUtilitiesInventoryWaterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_36b2a9f7-1407-4d45-8aa1-9becc42a755f" xlink:to="loc_us-gaap_PublicUtilitiesInventoryWaterMember_640ed8ce-a96b-44c8-be2f-7e5ef52fe66e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_ElectricMember_535c3ebe-a7a6-41c0-8fc5-e55357279230" xlink:href="xyl-20230630.xsd#xyl_ElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_36b2a9f7-1407-4d45-8aa1-9becc42a755f" xlink:to="loc_xyl_ElectricMember_535c3ebe-a7a6-41c0-8fc5-e55357279230" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BuildingServicesMember_1c4a4b60-f3e1-4e7f-9630-9b5eb3e295d3" xlink:href="xyl-20230630.xsd#xyl_BuildingServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_36b2a9f7-1407-4d45-8aa1-9becc42a755f" xlink:to="loc_xyl_BuildingServicesMember_1c4a4b60-f3e1-4e7f-9630-9b5eb3e295d3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_17c53d3d-0215-466a-9bd8-f8a75405920b" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_4db70fbe-0bab-402f-94d5-6d037f64eb75" xlink:to="loc_srt_StatementGeographicalAxis_17c53d3d-0215-466a-9bd8-f8a75405920b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_17c53d3d-0215-466a-9bd8-f8a75405920b_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_17c53d3d-0215-466a-9bd8-f8a75405920b" xlink:to="loc_srt_SegmentGeographicalDomain_17c53d3d-0215-466a-9bd8-f8a75405920b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_6b675ad1-1a40-4d04-bb0d-aada3e5ded8f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_17c53d3d-0215-466a-9bd8-f8a75405920b" xlink:to="loc_srt_SegmentGeographicalDomain_6b675ad1-1a40-4d04-bb0d-aada3e5ded8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_61be5818-e169-4123-a344-d02a4e67bbb7" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6b675ad1-1a40-4d04-bb0d-aada3e5ded8f" xlink:to="loc_country_US_61be5818-e169-4123-a344-d02a4e67bbb7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_WesternEuropeMember_b3441976-4784-441f-ba86-dc95b8688887" xlink:href="xyl-20230630.xsd#xyl_WesternEuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6b675ad1-1a40-4d04-bb0d-aada3e5ded8f" xlink:to="loc_xyl_WesternEuropeMember_b3441976-4784-441f-ba86-dc95b8688887" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EmergingMarketsMember_5a801cf8-0aa8-41e4-af4a-bc4bd0b192bf" xlink:href="xyl-20230630.xsd#xyl_EmergingMarketsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6b675ad1-1a40-4d04-bb0d-aada3e5ded8f" xlink:to="loc_xyl_EmergingMarketsMember_5a801cf8-0aa8-41e4-af4a-bc4bd0b192bf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_OtherGeographicalRegionsMember_1855e405-cd94-4bce-a11a-4346e600ad59" xlink:href="xyl-20230630.xsd#xyl_OtherGeographicalRegionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6b675ad1-1a40-4d04-bb0d-aada3e5ded8f" xlink:to="loc_xyl_OtherGeographicalRegionsMember_1855e405-cd94-4bce-a11a-4346e600ad59" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/RevenueNarrativeDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#RevenueNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/RevenueNarrativeDetails" xlink:type="extended" id="i390f6712fbe54cbabb8ff29e067047d8_RevenueNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_48145595-9c35-4126-858f-fd9f85e6bb34" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_3d778976-1292-41ac-aefc-4e4e300ae6a1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_48145595-9c35-4126-858f-fd9f85e6bb34" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_3d778976-1292-41ac-aefc-4e4e300ae6a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_56d1a1a5-89a4-44bc-a986-faffd0e54e0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_48145595-9c35-4126-858f-fd9f85e6bb34" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_56d1a1a5-89a4-44bc-a986-faffd0e54e0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_cbd594a7-f54b-4c74-8bee-947786d2c793" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_48145595-9c35-4126-858f-fd9f85e6bb34" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_cbd594a7-f54b-4c74-8bee-947786d2c793" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_ca078b14-4aac-47bf-bd4c-f240e8f12152" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_cbd594a7-f54b-4c74-8bee-947786d2c793" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_ca078b14-4aac-47bf-bd4c-f240e8f12152" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_52cee997-42b3-4a40-9024-948513052e7e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_cbd594a7-f54b-4c74-8bee-947786d2c793" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_52cee997-42b3-4a40-9024-948513052e7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_52cee997-42b3-4a40-9024-948513052e7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_52cee997-42b3-4a40-9024-948513052e7e" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_52cee997-42b3-4a40-9024-948513052e7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0266ce9d-c85b-4fae-9a4e-4a5639fb011d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_52cee997-42b3-4a40-9024-948513052e7e" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0266ce9d-c85b-4fae-9a4e-4a5639fb011d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EvoquaAcquisitionMember_7da9e6e1-b846-425a-a0fb-6c739161bcb0" xlink:href="xyl-20230630.xsd#xyl_EvoquaAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0266ce9d-c85b-4fae-9a4e-4a5639fb011d" xlink:to="loc_xyl_EvoquaAcquisitionMember_7da9e6e1-b846-425a-a0fb-6c739161bcb0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/RevenueNarrativeDetails_1" xlink:type="simple" xlink:href="xyl-20230630.xsd#RevenueNarrativeDetails_1"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/RevenueNarrativeDetails_1" xlink:type="extended" id="ic60176034b0242ed954dc734b9c84194_RevenueNarrativeDetails_1">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_48145595-9c35-4126-858f-fd9f85e6bb34" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_3d778976-1292-41ac-aefc-4e4e300ae6a1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_48145595-9c35-4126-858f-fd9f85e6bb34" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_3d778976-1292-41ac-aefc-4e4e300ae6a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_56d1a1a5-89a4-44bc-a986-faffd0e54e0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_48145595-9c35-4126-858f-fd9f85e6bb34" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_56d1a1a5-89a4-44bc-a986-faffd0e54e0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_cbd594a7-f54b-4c74-8bee-947786d2c793" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_48145595-9c35-4126-858f-fd9f85e6bb34" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_cbd594a7-f54b-4c74-8bee-947786d2c793" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_52cee997-42b3-4a40-9024-948513052e7e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_cbd594a7-f54b-4c74-8bee-947786d2c793" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_52cee997-42b3-4a40-9024-948513052e7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_52cee997-42b3-4a40-9024-948513052e7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_52cee997-42b3-4a40-9024-948513052e7e" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_52cee997-42b3-4a40-9024-948513052e7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0266ce9d-c85b-4fae-9a4e-4a5639fb011d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_52cee997-42b3-4a40-9024-948513052e7e" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0266ce9d-c85b-4fae-9a4e-4a5639fb011d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EvoquaAcquisitionMember_7da9e6e1-b846-425a-a0fb-6c739161bcb0" xlink:href="xyl-20230630.xsd#xyl_EvoquaAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0266ce9d-c85b-4fae-9a4e-4a5639fb011d" xlink:to="loc_xyl_EvoquaAcquisitionMember_7da9e6e1-b846-425a-a0fb-6c739161bcb0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/RestructuringChargesTextualsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#RestructuringChargesTextualsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/RestructuringChargesTextualsDetails" xlink:type="extended" id="ida015738b40142e5afe81a75282d4fe5_RestructuringChargesTextualsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_f14ce842-6b5e-4caf-9496-a444b11dd55b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_fa1aee8a-3afb-46f3-b668-1cc407fbe16a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringAndRelatedCostIncurredCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_f14ce842-6b5e-4caf-9496-a444b11dd55b" xlink:to="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_fa1aee8a-3afb-46f3-b668-1cc407fbe16a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_667275c8-5ffb-4270-b0f9-516207641124" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_f14ce842-6b5e-4caf-9496-a444b11dd55b" xlink:to="loc_us-gaap_RestructuringCharges_667275c8-5ffb-4270-b0f9-516207641124" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_bf0f40a7-6e97-458f-845e-3dd6c8bdd860" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_f14ce842-6b5e-4caf-9496-a444b11dd55b" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_bf0f40a7-6e97-458f-845e-3dd6c8bdd860" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_16ba1fd2-4aad-432e-ad83-0e425f587fff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCharges"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_fef1ad15-fdd2-4652-9531-24da85143a1c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_f14ce842-6b5e-4caf-9496-a444b11dd55b" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_fef1ad15-fdd2-4652-9531-24da85143a1c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_766ca64d-c5e6-48f4-80e7-fca4decfe1d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_fef1ad15-fdd2-4652-9531-24da85143a1c" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_766ca64d-c5e6-48f4-80e7-fca4decfe1d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_766ca64d-c5e6-48f4-80e7-fca4decfe1d1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_766ca64d-c5e6-48f4-80e7-fca4decfe1d1" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_766ca64d-c5e6-48f4-80e7-fca4decfe1d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_cfb38641-299e-4c21-bf53-2a7622aa62ee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_766ca64d-c5e6-48f4-80e7-fca4decfe1d1" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_cfb38641-299e-4c21-bf53-2a7622aa62ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_651af4a8-c3c2-4b77-9255-93e5b85068a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_cfb38641-299e-4c21-bf53-2a7622aa62ee" xlink:to="loc_us-gaap_StockCompensationPlanMember_651af4a8-c3c2-4b77-9255-93e5b85068a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_cfc61eb9-553a-4451-ae2e-b778773aaaba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_cfb38641-299e-4c21-bf53-2a7622aa62ee" xlink:to="loc_us-gaap_EmployeeSeveranceMember_cfc61eb9-553a-4451-ae2e-b778773aaaba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringMember_a03a6248-c1a8-4f11-905d-d2da40ddfd1c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherRestructuringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_cfb38641-299e-4c21-bf53-2a7622aa62ee" xlink:to="loc_us-gaap_OtherRestructuringMember_a03a6248-c1a8-4f11-905d-d2da40ddfd1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_2c31a704-f70d-4cca-aae5-902e30cad5fa" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_fef1ad15-fdd2-4652-9531-24da85143a1c" xlink:to="loc_srt_RangeAxis_2c31a704-f70d-4cca-aae5-902e30cad5fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2c31a704-f70d-4cca-aae5-902e30cad5fa_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_2c31a704-f70d-4cca-aae5-902e30cad5fa" xlink:to="loc_srt_RangeMember_2c31a704-f70d-4cca-aae5-902e30cad5fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_025d6049-868e-40b8-ab95-4cd098ed9adf" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_2c31a704-f70d-4cca-aae5-902e30cad5fa" xlink:to="loc_srt_RangeMember_025d6049-868e-40b8-ab95-4cd098ed9adf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_ed2533d8-f095-40eb-b319-045b96ce238c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_025d6049-868e-40b8-ab95-4cd098ed9adf" xlink:to="loc_srt_MaximumMember_ed2533d8-f095-40eb-b319-045b96ce238c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_646e53f0-116a-4cf4-8c87-4a73628e449a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_fef1ad15-fdd2-4652-9531-24da85143a1c" xlink:to="loc_us-gaap_RestructuringPlanAxis_646e53f0-116a-4cf4-8c87-4a73628e449a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_646e53f0-116a-4cf4-8c87-4a73628e449a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_646e53f0-116a-4cf4-8c87-4a73628e449a" xlink:to="loc_us-gaap_RestructuringPlanDomain_646e53f0-116a-4cf4-8c87-4a73628e449a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_ee9c7435-6e20-4a05-ae5b-0c08b19fd56c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_646e53f0-116a-4cf4-8c87-4a73628e449a" xlink:to="loc_us-gaap_RestructuringPlanDomain_ee9c7435-6e20-4a05-ae5b-0c08b19fd56c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_TwoThousandTwentyRestructuringPlanMember_565f253b-1b95-4ca7-9f79-e647b0c7c968" xlink:href="xyl-20230630.xsd#xyl_TwoThousandTwentyRestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_ee9c7435-6e20-4a05-ae5b-0c08b19fd56c" xlink:to="loc_xyl_TwoThousandTwentyRestructuringPlanMember_565f253b-1b95-4ca7-9f79-e647b0c7c968" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/RestructuringChargesRestructuringChargesDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#RestructuringChargesRestructuringChargesDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/RestructuringChargesRestructuringChargesDetails" xlink:type="extended" id="ibf663b950f534bbe8edc01e6856d88bd_RestructuringChargesRestructuringChargesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_4f59ce50-2e39-47af-866a-858875b98909" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeveranceCosts1_09712d52-9556-4548-9bd1-6242aa0e4063" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeveranceCosts1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4f59ce50-2e39-47af-866a-858875b98909" xlink:to="loc_us-gaap_SeveranceCosts1_09712d52-9556-4548-9bd1-6242aa0e4063" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_aaf995ad-d259-4d82-805c-03adb0e1f827" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4f59ce50-2e39-47af-866a-858875b98909" xlink:to="loc_us-gaap_RestructuringCharges_aaf995ad-d259-4d82-805c-03adb0e1f827" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_679c93af-249f-44b5-8617-39c09b4b5b74" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4f59ce50-2e39-47af-866a-858875b98909" xlink:to="loc_us-gaap_AssetImpairmentCharges_679c93af-249f-44b5-8617-39c09b4b5b74" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_AssetImpairmentandRestructuringCharges_4f1a3b48-f54e-4efe-b2c0-f68da8af693a" xlink:href="xyl-20230630.xsd#xyl_AssetImpairmentandRestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4f59ce50-2e39-47af-866a-858875b98909" xlink:to="loc_xyl_AssetImpairmentandRestructuringCharges_4f1a3b48-f54e-4efe-b2c0-f68da8af693a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveAccrualAdjustment1_5e7a055a-48f9-498a-b687-9c83affc8e67" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringReserveAccrualAdjustment1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4f59ce50-2e39-47af-866a-858875b98909" xlink:to="loc_us-gaap_RestructuringReserveAccrualAdjustment1_5e7a055a-48f9-498a-b687-9c83affc8e67" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_eaabc2cf-b4bc-4eb1-96c7-2a8845050dad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4f59ce50-2e39-47af-866a-858875b98909" xlink:to="loc_us-gaap_RestructuringReserve_eaabc2cf-b4bc-4eb1-96c7-2a8845050dad" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_88103e6b-8e67-464a-a0a8-1ebeace7bbb2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4f59ce50-2e39-47af-866a-858875b98909" xlink:to="loc_us-gaap_PaymentsForRestructuring_88103e6b-8e67-464a-a0a8-1ebeace7bbb2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_RestructuringReserveShareBasedCompensation_cec3d3cb-7468-48ec-ab60-a13d10c31b14" xlink:href="xyl-20230630.xsd#xyl_RestructuringReserveShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4f59ce50-2e39-47af-866a-858875b98909" xlink:to="loc_xyl_RestructuringReserveShareBasedCompensation_cec3d3cb-7468-48ec-ab60-a13d10c31b14" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveTranslationAndOtherAdjustment_19776e85-3909-42f7-b625-fdd195bcf644" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringReserveTranslationAndOtherAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4f59ce50-2e39-47af-866a-858875b98909" xlink:to="loc_us-gaap_RestructuringReserveTranslationAndOtherAdjustment_19776e85-3909-42f7-b625-fdd195bcf644" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_42289eeb-5c60-467f-b701-dd5e1cef8198" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4f59ce50-2e39-47af-866a-858875b98909" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_42289eeb-5c60-467f-b701-dd5e1cef8198" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_c74eb683-a58c-4aef-8b2c-e7f49cabb32c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_42289eeb-5c60-467f-b701-dd5e1cef8198" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_c74eb683-a58c-4aef-8b2c-e7f49cabb32c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c74eb683-a58c-4aef-8b2c-e7f49cabb32c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_c74eb683-a58c-4aef-8b2c-e7f49cabb32c" xlink:to="loc_us-gaap_SegmentDomain_c74eb683-a58c-4aef-8b2c-e7f49cabb32c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_dba664d7-2d57-4af7-9713-602a45f1cdc4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_c74eb683-a58c-4aef-8b2c-e7f49cabb32c" xlink:to="loc_us-gaap_SegmentDomain_dba664d7-2d57-4af7-9713-602a45f1cdc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_ddb43172-a3f2-4e2f-ac52-4f3b2b9e8d2c" xlink:href="xyl-20230630.xsd#xyl_WaterInfrastructureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_dba664d7-2d57-4af7-9713-602a45f1cdc4" xlink:to="loc_xyl_WaterInfrastructureMember_ddb43172-a3f2-4e2f-ac52-4f3b2b9e8d2c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_301ea282-3f35-4e8a-809e-28891077b4ce" xlink:href="xyl-20230630.xsd#xyl_AppliedWaterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_dba664d7-2d57-4af7-9713-602a45f1cdc4" xlink:to="loc_xyl_AppliedWaterMember_301ea282-3f35-4e8a-809e-28891077b4ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_0923a4f0-b48a-4749-8eef-155c9ba43f14" xlink:href="xyl-20230630.xsd#xyl_MeasurementandControlSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_dba664d7-2d57-4af7-9713-602a45f1cdc4" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_0923a4f0-b48a-4749-8eef-155c9ba43f14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_IntegratedSolutionsServicesMember_9c20565f-f153-41c7-ade9-195b2a15005c" xlink:href="xyl-20230630.xsd#xyl_IntegratedSolutionsServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_dba664d7-2d57-4af7-9713-602a45f1cdc4" xlink:to="loc_xyl_IntegratedSolutionsServicesMember_9c20565f-f153-41c7-ade9-195b2a15005c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_583bfc8e-22ee-4aeb-a31a-dcd561c74d34" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_42289eeb-5c60-467f-b701-dd5e1cef8198" xlink:to="loc_srt_ConsolidationItemsAxis_583bfc8e-22ee-4aeb-a31a-dcd561c74d34" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_583bfc8e-22ee-4aeb-a31a-dcd561c74d34_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_583bfc8e-22ee-4aeb-a31a-dcd561c74d34" xlink:to="loc_srt_ConsolidationItemsDomain_583bfc8e-22ee-4aeb-a31a-dcd561c74d34_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_f343aa10-56e0-49bf-b97b-be122a34011c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_583bfc8e-22ee-4aeb-a31a-dcd561c74d34" xlink:to="loc_srt_ConsolidationItemsDomain_f343aa10-56e0-49bf-b97b-be122a34011c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_1fa0f94b-66c0-4962-8f2e-fcd431d416f0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_f343aa10-56e0-49bf-b97b-be122a34011c" xlink:to="loc_us-gaap_OperatingSegmentsMember_1fa0f94b-66c0-4962-8f2e-fcd431d416f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_0920a62f-0e5b-4faf-b72e-edf5d36c5e52" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_f343aa10-56e0-49bf-b97b-be122a34011c" xlink:to="loc_us-gaap_CorporateNonSegmentMember_0920a62f-0e5b-4faf-b72e-edf5d36c5e52" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/RestructuringChargesAccrualRollfowardDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#RestructuringChargesAccrualRollfowardDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/RestructuringChargesAccrualRollfowardDetails" xlink:type="extended" id="i33acbb07f6b64cf7885bf1c3b0b830ec_RestructuringChargesAccrualRollfowardDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_fb383f9c-cd4c-4a70-aca5-13aaec82a15b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_141d2a26-f928-4553-8d82-4052584e5eb0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_fb383f9c-cd4c-4a70-aca5-13aaec82a15b" xlink:to="loc_us-gaap_RestructuringReserveRollForward_141d2a26-f928-4553-8d82-4052584e5eb0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_fe2a9cfc-5114-4473-8626-73b332eb80d3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_141d2a26-f928-4553-8d82-4052584e5eb0" xlink:to="loc_us-gaap_RestructuringReserve_fe2a9cfc-5114-4473-8626-73b332eb80d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_1f57f600-e89f-45de-8252-8305553e3211" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_141d2a26-f928-4553-8d82-4052584e5eb0" xlink:to="loc_us-gaap_RestructuringCharges_1f57f600-e89f-45de-8252-8305553e3211" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_2155beab-b6f8-4d18-b8e4-77ab0ac29013" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_141d2a26-f928-4553-8d82-4052584e5eb0" xlink:to="loc_us-gaap_PaymentsForRestructuring_2155beab-b6f8-4d18-b8e4-77ab0ac29013" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_RestructuringReserveShareBasedCompensation_cac18d8a-513d-4f19-8771-6f291ec8727d" xlink:href="xyl-20230630.xsd#xyl_RestructuringReserveShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_141d2a26-f928-4553-8d82-4052584e5eb0" xlink:to="loc_xyl_RestructuringReserveShareBasedCompensation_cac18d8a-513d-4f19-8771-6f291ec8727d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_0b82090e-fc40-4768-bae2-ae25b970446b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringReserve"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_3496b69e-46e3-44c0-acff-ed5978929bb6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_fb383f9c-cd4c-4a70-aca5-13aaec82a15b" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_3496b69e-46e3-44c0-acff-ed5978929bb6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_ecbe4303-5470-44b3-976e-5cebe00a6c79" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_3496b69e-46e3-44c0-acff-ed5978929bb6" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_ecbe4303-5470-44b3-976e-5cebe00a6c79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ecbe4303-5470-44b3-976e-5cebe00a6c79_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ecbe4303-5470-44b3-976e-5cebe00a6c79" xlink:to="loc_us-gaap_SegmentDomain_ecbe4303-5470-44b3-976e-5cebe00a6c79_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_e5e52c1d-38de-4bfc-9c55-7db00713c128" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ecbe4303-5470-44b3-976e-5cebe00a6c79" xlink:to="loc_us-gaap_SegmentDomain_e5e52c1d-38de-4bfc-9c55-7db00713c128" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_c095c16a-651c-4081-abda-23cc52515c8e" xlink:href="xyl-20230630.xsd#xyl_WaterInfrastructureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e5e52c1d-38de-4bfc-9c55-7db00713c128" xlink:to="loc_xyl_WaterInfrastructureMember_c095c16a-651c-4081-abda-23cc52515c8e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_1bd2ca40-1fc3-49aa-81d0-5c1815d95c16" xlink:href="xyl-20230630.xsd#xyl_AppliedWaterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e5e52c1d-38de-4bfc-9c55-7db00713c128" xlink:to="loc_xyl_AppliedWaterMember_1bd2ca40-1fc3-49aa-81d0-5c1815d95c16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_2ac33736-dd79-487d-8825-dbe53e427936" xlink:href="xyl-20230630.xsd#xyl_MeasurementandControlSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e5e52c1d-38de-4bfc-9c55-7db00713c128" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_2ac33736-dd79-487d-8825-dbe53e427936" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_IntegratedSolutionsServicesMember_1918d8fb-fc3e-4e21-8a44-a9240703c57b" xlink:href="xyl-20230630.xsd#xyl_IntegratedSolutionsServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e5e52c1d-38de-4bfc-9c55-7db00713c128" xlink:to="loc_xyl_IntegratedSolutionsServicesMember_1918d8fb-fc3e-4e21-8a44-a9240703c57b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_4e01a4c8-b8b7-4312-ad01-4b7047b3b620" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_3496b69e-46e3-44c0-acff-ed5978929bb6" xlink:to="loc_srt_ConsolidationItemsAxis_4e01a4c8-b8b7-4312-ad01-4b7047b3b620" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_4e01a4c8-b8b7-4312-ad01-4b7047b3b620_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_4e01a4c8-b8b7-4312-ad01-4b7047b3b620" xlink:to="loc_srt_ConsolidationItemsDomain_4e01a4c8-b8b7-4312-ad01-4b7047b3b620_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_f4172f62-3b09-4738-b2d1-7f57cc1058d8" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_4e01a4c8-b8b7-4312-ad01-4b7047b3b620" xlink:to="loc_srt_ConsolidationItemsDomain_f4172f62-3b09-4738-b2d1-7f57cc1058d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_73e9a7b8-008e-45cb-b61d-3f127fec54ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_f4172f62-3b09-4738-b2d1-7f57cc1058d8" xlink:to="loc_us-gaap_OperatingSegmentsMember_73e9a7b8-008e-45cb-b61d-3f127fec54ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_b87108a3-0e08-4fea-9ef9-688858d38cf4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MaterialReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_f4172f62-3b09-4738-b2d1-7f57cc1058d8" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_b87108a3-0e08-4fea-9ef9-688858d38cf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_fd87811c-1bea-4bdb-abb8-a0a4e1e3c064" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_f4172f62-3b09-4738-b2d1-7f57cc1058d8" xlink:to="loc_us-gaap_CorporateNonSegmentMember_fd87811c-1bea-4bdb-abb8-a0a4e1e3c064" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/RestructuringChargesEstimatedRestructuringCostsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#RestructuringChargesEstimatedRestructuringCostsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/RestructuringChargesEstimatedRestructuringCostsDetails" xlink:type="extended" id="i15070aef7ad340838cc528c3d3f104e5_RestructuringChargesEstimatedRestructuringCostsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_434333ee-19df-4b9e-9d15-b5c5a17e5656" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCost1_07735cdb-826e-407a-a7e8-ca5055620a63" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringAndRelatedCostExpectedCost1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_434333ee-19df-4b9e-9d15-b5c5a17e5656" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCost1_07735cdb-826e-407a-a7e8-ca5055620a63" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_28d6dbbb-01e5-40e3-b94e-b351cc573e3e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringAndRelatedCostIncurredCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_434333ee-19df-4b9e-9d15-b5c5a17e5656" xlink:to="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_28d6dbbb-01e5-40e3-b94e-b351cc573e3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_efd48b15-1e81-4a87-82af-36a714070ebd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_434333ee-19df-4b9e-9d15-b5c5a17e5656" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_efd48b15-1e81-4a87-82af-36a714070ebd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_896dfc21-6acb-4ce8-8352-c624919a2ff6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_434333ee-19df-4b9e-9d15-b5c5a17e5656" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_896dfc21-6acb-4ce8-8352-c624919a2ff6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_c94624b2-b2b1-47bb-9c4a-a5a377b5fcbb" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_896dfc21-6acb-4ce8-8352-c624919a2ff6" xlink:to="loc_srt_ConsolidationItemsAxis_c94624b2-b2b1-47bb-9c4a-a5a377b5fcbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_c94624b2-b2b1-47bb-9c4a-a5a377b5fcbb_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_c94624b2-b2b1-47bb-9c4a-a5a377b5fcbb" xlink:to="loc_srt_ConsolidationItemsDomain_c94624b2-b2b1-47bb-9c4a-a5a377b5fcbb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_c3b6b42e-1d70-4cb5-a893-6a14e79ca28c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_c94624b2-b2b1-47bb-9c4a-a5a377b5fcbb" xlink:to="loc_srt_ConsolidationItemsDomain_c3b6b42e-1d70-4cb5-a893-6a14e79ca28c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_0cc996ae-32d2-4f22-86ec-3e9c722db171" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_c3b6b42e-1d70-4cb5-a893-6a14e79ca28c" xlink:to="loc_us-gaap_OperatingSegmentsMember_0cc996ae-32d2-4f22-86ec-3e9c722db171" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_bc29a153-c59b-46ec-b803-40b4b72926c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_c3b6b42e-1d70-4cb5-a893-6a14e79ca28c" xlink:to="loc_us-gaap_CorporateNonSegmentMember_bc29a153-c59b-46ec-b803-40b4b72926c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_1f6e8e3c-38c9-4106-8253-8b9a9719c8b4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_896dfc21-6acb-4ce8-8352-c624919a2ff6" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_1f6e8e3c-38c9-4106-8253-8b9a9719c8b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_1f6e8e3c-38c9-4106-8253-8b9a9719c8b4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_1f6e8e3c-38c9-4106-8253-8b9a9719c8b4" xlink:to="loc_us-gaap_SegmentDomain_1f6e8e3c-38c9-4106-8253-8b9a9719c8b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_b6522302-cb2d-40e8-8d3f-4a7cd96b11a9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_1f6e8e3c-38c9-4106-8253-8b9a9719c8b4" xlink:to="loc_us-gaap_SegmentDomain_b6522302-cb2d-40e8-8d3f-4a7cd96b11a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_82c8dc05-4851-4299-8f72-ca396564ef8a" xlink:href="xyl-20230630.xsd#xyl_WaterInfrastructureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_b6522302-cb2d-40e8-8d3f-4a7cd96b11a9" xlink:to="loc_xyl_WaterInfrastructureMember_82c8dc05-4851-4299-8f72-ca396564ef8a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_525eeaa9-49ea-49b2-a897-a7fe5684f837" xlink:href="xyl-20230630.xsd#xyl_AppliedWaterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_b6522302-cb2d-40e8-8d3f-4a7cd96b11a9" xlink:to="loc_xyl_AppliedWaterMember_525eeaa9-49ea-49b2-a897-a7fe5684f837" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_98cad7cc-324e-43ef-aff3-09b7c298d17b" xlink:href="xyl-20230630.xsd#xyl_MeasurementandControlSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_b6522302-cb2d-40e8-8d3f-4a7cd96b11a9" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_98cad7cc-324e-43ef-aff3-09b7c298d17b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_IntegratedSolutionsServicesMember_fdd6b490-4047-4f9c-abc1-e73a7af7b79a" xlink:href="xyl-20230630.xsd#xyl_IntegratedSolutionsServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_b6522302-cb2d-40e8-8d3f-4a7cd96b11a9" xlink:to="loc_xyl_IntegratedSolutionsServicesMember_fdd6b490-4047-4f9c-abc1-e73a7af7b79a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_d1082e8c-bfc3-4843-8b01-0242535427b7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_896dfc21-6acb-4ce8-8352-c624919a2ff6" xlink:to="loc_us-gaap_RestructuringPlanAxis_d1082e8c-bfc3-4843-8b01-0242535427b7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_d1082e8c-bfc3-4843-8b01-0242535427b7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_d1082e8c-bfc3-4843-8b01-0242535427b7" xlink:to="loc_us-gaap_RestructuringPlanDomain_d1082e8c-bfc3-4843-8b01-0242535427b7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_f54cc6f9-5fb4-48ce-9094-104627b643ee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_d1082e8c-bfc3-4843-8b01-0242535427b7" xlink:to="loc_us-gaap_RestructuringPlanDomain_f54cc6f9-5fb4-48ce-9094-104627b643ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_TwoThousandTwentyRestructuringPlanMember_22c27175-ade1-4424-ab6d-a53fa0ef771f" xlink:href="xyl-20230630.xsd#xyl_TwoThousandTwentyRestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_f54cc6f9-5fb4-48ce-9094-104627b643ee" xlink:to="loc_xyl_TwoThousandTwentyRestructuringPlanMember_22c27175-ade1-4424-ab6d-a53fa0ef771f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_TwoThousandTwentyOneRestructuringPlanMember_cb728078-8638-4b63-9678-61c25723b1de" xlink:href="xyl-20230630.xsd#xyl_TwoThousandTwentyOneRestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_f54cc6f9-5fb4-48ce-9094-104627b643ee" xlink:to="loc_xyl_TwoThousandTwentyOneRestructuringPlanMember_cb728078-8638-4b63-9678-61c25723b1de" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/EarningsPerShareCalculationsforEPSDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#EarningsPerShareCalculationsforEPSDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/EarningsPerShareCalculationsforEPSDetails" xlink:type="extended" id="i2fe1f83f59c1424994e0d6a93d5e6cfe_EarningsPerShareCalculationsforEPSDetails">
    <link:loc xlink:type="locator" xlink:label="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedLineItems_9cbbcbfb-d82a-462e-9c90-f2b33781df10" xlink:href="xyl-20230630.xsd#xyl_ScheduleOfEarningsPerShareBasicAndDilutedLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareReconciliationAbstract_0b6cd3ef-070d-42e8-bf04-b3e74303c802" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareReconciliationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedLineItems_9cbbcbfb-d82a-462e-9c90-f2b33781df10" xlink:to="loc_us-gaap_EarningsPerShareReconciliationAbstract_0b6cd3ef-070d-42e8-bf04-b3e74303c802" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_83df68c8-8187-4aad-8c88-6a4eb2203b48" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_0b6cd3ef-070d-42e8-bf04-b3e74303c802" xlink:to="loc_us-gaap_NetIncomeLoss_83df68c8-8187-4aad-8c88-6a4eb2203b48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_5995544b-c2c6-4f16-aa2a-d774510f52ec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_0b6cd3ef-070d-42e8-bf04-b3e74303c802" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_5995544b-c2c6-4f16-aa2a-d774510f52ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesIssuedBasic_e4031d36-ea8b-49d0-ba52-5b2cab3d75d2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfSharesIssuedBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_5995544b-c2c6-4f16-aa2a-d774510f52ec" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesIssuedBasic_e4031d36-ea8b-49d0-ba52-5b2cab3d75d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights_a45490bd-6548-497a-8ec7-0717386642d2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_5995544b-c2c6-4f16-aa2a-d774510f52ec" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights_a45490bd-6548-497a-8ec7-0717386642d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_1d7cd459-07e7-46d7-ad01-4050e9efeb0e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_5995544b-c2c6-4f16-aa2a-d774510f52ec" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_1d7cd459-07e7-46d7-ad01-4050e9efeb0e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_f17acf85-b853-4d6c-85fb-1b5f1ea43111" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_0b6cd3ef-070d-42e8-bf04-b3e74303c802" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_f17acf85-b853-4d6c-85fb-1b5f1ea43111" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_36a36658-260e-4bea-80bd-66cba8696900" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_f17acf85-b853-4d6c-85fb-1b5f1ea43111" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_36a36658-260e-4bea-80bd-66cba8696900" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_888feaa0-ec58-4ea2-8de9-fc9725df353a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_f17acf85-b853-4d6c-85fb-1b5f1ea43111" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_888feaa0-ec58-4ea2-8de9-fc9725df353a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_23433874-a415-46f2-b80f-da2e8aea80f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_f17acf85-b853-4d6c-85fb-1b5f1ea43111" xlink:to="loc_us-gaap_EarningsPerShareBasic_23433874-a415-46f2-b80f-da2e8aea80f2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_5a57788a-ae44-44c0-9e18-86c4deae168d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_f17acf85-b853-4d6c-85fb-1b5f1ea43111" xlink:to="loc_us-gaap_EarningsPerShareDiluted_5a57788a-ae44-44c0-9e18-86c4deae168d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedTable_b066d885-ecb6-45b9-b186-14448e97ac19" xlink:href="xyl-20230630.xsd#xyl_ScheduleOfEarningsPerShareBasicAndDilutedTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedLineItems_9cbbcbfb-d82a-462e-9c90-f2b33781df10" xlink:to="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedTable_b066d885-ecb6-45b9-b186-14448e97ac19" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_49d8b871-a0a2-4ebc-afb1-3d9ab5687f43" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedTable_b066d885-ecb6-45b9-b186-14448e97ac19" xlink:to="loc_us-gaap_AwardTypeAxis_49d8b871-a0a2-4ebc-afb1-3d9ab5687f43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_49d8b871-a0a2-4ebc-afb1-3d9ab5687f43_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_49d8b871-a0a2-4ebc-afb1-3d9ab5687f43" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_49d8b871-a0a2-4ebc-afb1-3d9ab5687f43_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_88d06d5d-fdd1-43b4-99cf-b0011572762e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_49d8b871-a0a2-4ebc-afb1-3d9ab5687f43" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_88d06d5d-fdd1-43b4-99cf-b0011572762e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_10d83522-73f4-4428-b2ef-c72a7791abf7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_88d06d5d-fdd1-43b4-99cf-b0011572762e" xlink:to="loc_us-gaap_EmployeeStockOptionMember_10d83522-73f4-4428-b2ef-c72a7791abf7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_2d15aa86-d3d0-4f02-b238-6b782b7f66ac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_88d06d5d-fdd1-43b4-99cf-b0011572762e" xlink:to="loc_us-gaap_RestrictedStockMember_2d15aa86-d3d0-4f02-b238-6b782b7f66ac" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/EarningsPerShareSummaryofAntidilutiveSecuritiesDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#EarningsPerShareSummaryofAntidilutiveSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/EarningsPerShareSummaryofAntidilutiveSecuritiesDetails" xlink:type="extended" id="i048bbc0f09c84e59bddb96089092df95_EarningsPerShareSummaryofAntidilutiveSecuritiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_d4c36fe0-0968-4098-a7b3-3eb717d016fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAbstract_ee43aa0f-cb1c-466d-8b34-df2d7383763c" xlink:href="xyl-20230630.xsd#xyl_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_d4c36fe0-0968-4098-a7b3-3eb717d016fa" xlink:to="loc_xyl_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAbstract_ee43aa0f-cb1c-466d-8b34-df2d7383763c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_9d2ffa0c-4588-4730-9267-67343be40126" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAbstract_ee43aa0f-cb1c-466d-8b34-df2d7383763c" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_9d2ffa0c-4588-4730-9267-67343be40126" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_daa3430d-461b-442e-9f90-397f302e7112" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_d4c36fe0-0968-4098-a7b3-3eb717d016fa" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_daa3430d-461b-442e-9f90-397f302e7112" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_43c61faa-c3e2-47dc-bcd8-25449e8b2492" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_daa3430d-461b-442e-9f90-397f302e7112" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_43c61faa-c3e2-47dc-bcd8-25449e8b2492" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_43c61faa-c3e2-47dc-bcd8-25449e8b2492_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_43c61faa-c3e2-47dc-bcd8-25449e8b2492" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_43c61faa-c3e2-47dc-bcd8-25449e8b2492_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_8f274c55-d882-4dbe-a760-49a7712e72bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_43c61faa-c3e2-47dc-bcd8-25449e8b2492" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_8f274c55-d882-4dbe-a760-49a7712e72bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_0888c0b8-7c28-4fcd-bdeb-9cbe83fd4964" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_8f274c55-d882-4dbe-a760-49a7712e72bb" xlink:to="loc_us-gaap_EmployeeStockOptionMember_0888c0b8-7c28-4fcd-bdeb-9cbe83fd4964" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_e1acf901-70b8-469e-a2c2-26eee3db8edf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_8f274c55-d882-4dbe-a760-49a7712e72bb" xlink:to="loc_us-gaap_RestrictedStockMember_e1acf901-70b8-469e-a2c2-26eee3db8edf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_1c2cd401-ecbf-4070-b697-9cf1f4eb8239" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_8f274c55-d882-4dbe-a760-49a7712e72bb" xlink:to="loc_us-gaap_PerformanceSharesMember_1c2cd401-ecbf-4070-b697-9cf1f4eb8239" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsGoodwillRollforwardDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#GoodwillandOtherIntangibleAssetsGoodwillRollforwardDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsGoodwillRollforwardDetails" xlink:type="extended" id="i31baaf24088248639db706d4a111637b_GoodwillandOtherIntangibleAssetsGoodwillRollforwardDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems_4925a5ea-c8fb-4c96-a430-d5fa6902594e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_cd7df202-b35c-44d1-9313-c66881fffae6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems_4925a5ea-c8fb-4c96-a430-d5fa6902594e" xlink:to="loc_us-gaap_GoodwillRollForward_cd7df202-b35c-44d1-9313-c66881fffae6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_80fe1f81-7fe8-41d4-8a1a-749c026959ea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_cd7df202-b35c-44d1-9313-c66881fffae6" xlink:to="loc_us-gaap_Goodwill_80fe1f81-7fe8-41d4-8a1a-749c026959ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_GoodwillAcquiredDivestedDuringPeriod_14a143c9-f89f-4b86-bf82-6755602126fe" xlink:href="xyl-20230630.xsd#xyl_GoodwillAcquiredDivestedDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_cd7df202-b35c-44d1-9313-c66881fffae6" xlink:to="loc_xyl_GoodwillAcquiredDivestedDuringPeriod_14a143c9-f89f-4b86-bf82-6755602126fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_2c4fcff5-963f-48bc-8d30-1cf9b8478813" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_cd7df202-b35c-44d1-9313-c66881fffae6" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_2c4fcff5-963f-48bc-8d30-1cf9b8478813" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_63e9f27b-c27d-46cd-a45c-08ab62730a8d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentTable_85df7bba-031e-4690-8ea5-ef149406be85" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PublicUtilityPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems_4925a5ea-c8fb-4c96-a430-d5fa6902594e" xlink:to="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentTable_85df7bba-031e-4690-8ea5-ef149406be85" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_d064e989-7f53-4e4e-bbe7-5e57eb272c86" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentTable_85df7bba-031e-4690-8ea5-ef149406be85" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_d064e989-7f53-4e4e-bbe7-5e57eb272c86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_d064e989-7f53-4e4e-bbe7-5e57eb272c86_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_d064e989-7f53-4e4e-bbe7-5e57eb272c86" xlink:to="loc_us-gaap_SegmentDomain_d064e989-7f53-4e4e-bbe7-5e57eb272c86_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_e2782257-fbfd-46f3-b494-170800e49d9a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_d064e989-7f53-4e4e-bbe7-5e57eb272c86" xlink:to="loc_us-gaap_SegmentDomain_e2782257-fbfd-46f3-b494-170800e49d9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_eff02e6f-16f0-46d2-8a96-4f2a66f58bd1" xlink:href="xyl-20230630.xsd#xyl_WaterInfrastructureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e2782257-fbfd-46f3-b494-170800e49d9a" xlink:to="loc_xyl_WaterInfrastructureMember_eff02e6f-16f0-46d2-8a96-4f2a66f58bd1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_57ac60a4-fa2c-4a84-b3ba-3170f2700379" xlink:href="xyl-20230630.xsd#xyl_AppliedWaterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e2782257-fbfd-46f3-b494-170800e49d9a" xlink:to="loc_xyl_AppliedWaterMember_57ac60a4-fa2c-4a84-b3ba-3170f2700379" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_38430ab9-0be2-4c98-8884-7098d313838d" xlink:href="xyl-20230630.xsd#xyl_MeasurementandControlSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e2782257-fbfd-46f3-b494-170800e49d9a" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_38430ab9-0be2-4c98-8884-7098d313838d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_IntegratedSolutionsServicesMember_5bb7a9e8-bc56-443e-8acd-637cc9b533b1" xlink:href="xyl-20230630.xsd#xyl_IntegratedSolutionsServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e2782257-fbfd-46f3-b494-170800e49d9a" xlink:to="loc_xyl_IntegratedSolutionsServicesMember_5bb7a9e8-bc56-443e-8acd-637cc9b533b1" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsSummaryofIntangibleAssetsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#GoodwillandOtherIntangibleAssetsSummaryofIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsSummaryofIntangibleAssetsDetails" xlink:type="extended" id="i1a4d22db275140258fdbed854150327e_GoodwillandOtherIntangibleAssetsSummaryofIntangibleAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_a23619db-ebb4-4d26-9bed-53818e62f876" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_c39a7457-90f9-467d-bafc-8ac6854a35a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_a23619db-ebb4-4d26-9bed-53818e62f876" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_c39a7457-90f9-467d-bafc-8ac6854a35a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_8cf344bf-1059-4f1e-b4cd-32817090fdbe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_c39a7457-90f9-467d-bafc-8ac6854a35a2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_8cf344bf-1059-4f1e-b4cd-32817090fdbe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_13451d75-b397-47c0-bd47-10df8529b051" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_c39a7457-90f9-467d-bafc-8ac6854a35a2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_13451d75-b397-47c0-bd47-10df8529b051" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_9166e1d0-a9b5-449a-adb0-9b3a8c4a12b7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_c39a7457-90f9-467d-bafc-8ac6854a35a2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_9166e1d0-a9b5-449a-adb0-9b3a8c4a12b7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_0b7e57cc-94b2-4d5d-94e3-794d981cfa9d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_c39a7457-90f9-467d-bafc-8ac6854a35a2" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_0b7e57cc-94b2-4d5d-94e3-794d981cfa9d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_c9660d19-1c7a-4ae2-a0c9-b488ab032698" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_c39a7457-90f9-467d-bafc-8ac6854a35a2" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_c9660d19-1c7a-4ae2-a0c9-b488ab032698" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_df243bc0-7093-43a1-bd9c-32479ca6fb8e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_c39a7457-90f9-467d-bafc-8ac6854a35a2" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_df243bc0-7093-43a1-bd9c-32479ca6fb8e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_e5df4f25-b46c-4db2-bad6-0f674c9db313" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_a23619db-ebb4-4d26-9bed-53818e62f876" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_e5df4f25-b46c-4db2-bad6-0f674c9db313" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_e2f673c6-6ded-4be9-aa0a-21f54bbf5ae3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_a23619db-ebb4-4d26-9bed-53818e62f876" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_e2f673c6-6ded-4be9-aa0a-21f54bbf5ae3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_5f0797d0-2b81-4226-9544-22f3663e2e76" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_e2f673c6-6ded-4be9-aa0a-21f54bbf5ae3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_5f0797d0-2b81-4226-9544-22f3663e2e76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_5f0797d0-2b81-4226-9544-22f3663e2e76_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_5f0797d0-2b81-4226-9544-22f3663e2e76" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_5f0797d0-2b81-4226-9544-22f3663e2e76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb7b56b-672f-4797-9ff0-8c7ae5566160" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_5f0797d0-2b81-4226-9544-22f3663e2e76" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb7b56b-672f-4797-9ff0-8c7ae5566160" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_6e97e93e-d0fc-4e50-9d4a-fd24fb8491db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb7b56b-672f-4797-9ff0-8c7ae5566160" xlink:to="loc_us-gaap_CustomerRelationshipsMember_6e97e93e-d0fc-4e50-9d4a-fd24fb8491db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_ProprietaryandPatentedTechnologyMember_409d2bdb-5c82-4808-817e-df93f1a22f22" xlink:href="xyl-20230630.xsd#xyl_ProprietaryandPatentedTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb7b56b-672f-4797-9ff0-8c7ae5566160" xlink:to="loc_xyl_ProprietaryandPatentedTechnologyMember_409d2bdb-5c82-4808-817e-df93f1a22f22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksMember_466b0bef-1a24-4520-9a17-4002372780a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb7b56b-672f-4797-9ff0-8c7ae5566160" xlink:to="loc_us-gaap_TrademarksMember_466b0bef-1a24-4520-9a17-4002372780a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_58600099-a654-40aa-87a5-e4fbc9ce70d4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb7b56b-672f-4797-9ff0-8c7ae5566160" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_58600099-a654-40aa-87a5-e4fbc9ce70d4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_f40fd0e4-34dc-456d-a954-d38caa93e35c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb7b56b-672f-4797-9ff0-8c7ae5566160" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_f40fd0e4-34dc-456d-a954-d38caa93e35c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnclassifiedIndefinitelivedIntangibleAssetsMember_c0b61294-8104-43a0-bc69-7ce200402620" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnclassifiedIndefinitelivedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb7b56b-672f-4797-9ff0-8c7ae5566160" xlink:to="loc_us-gaap_UnclassifiedIndefinitelivedIntangibleAssetsMember_c0b61294-8104-43a0-bc69-7ce200402620" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsTextualDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#GoodwillandOtherIntangibleAssetsTextualDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsTextualDetails" xlink:type="extended" id="i1289634bbd194b609b6b85622db83937_GoodwillandOtherIntangibleAssetsTextualDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_90344638-c750-4f4c-8c6d-34ebf3620bda" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_c8d811cf-a3ea-475c-baa5-841c7a8aeb9f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_90344638-c750-4f4c-8c6d-34ebf3620bda" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_c8d811cf-a3ea-475c-baa5-841c7a8aeb9f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_64bbe02f-2eb5-4634-a46d-7dd9f2a5f315" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_90344638-c750-4f4c-8c6d-34ebf3620bda" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_64bbe02f-2eb5-4634-a46d-7dd9f2a5f315" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_3cef7501-a2b2-4144-a2e8-e92da18ce826" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_90344638-c750-4f4c-8c6d-34ebf3620bda" xlink:to="loc_us-gaap_AssetImpairmentCharges_3cef7501-a2b2-4144-a2e8-e92da18ce826" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_40e68537-8854-4acc-b022-9378094a8940" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_90344638-c750-4f4c-8c6d-34ebf3620bda" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_40e68537-8854-4acc-b022-9378094a8940" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_ebfdd328-9be9-4cbc-b0c4-739799cbeb36" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_40e68537-8854-4acc-b022-9378094a8940" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_ebfdd328-9be9-4cbc-b0c4-739799cbeb36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ebfdd328-9be9-4cbc-b0c4-739799cbeb36_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ebfdd328-9be9-4cbc-b0c4-739799cbeb36" xlink:to="loc_us-gaap_SegmentDomain_ebfdd328-9be9-4cbc-b0c4-739799cbeb36_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_1cf71d61-307d-47ec-a155-2189088df49f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ebfdd328-9be9-4cbc-b0c4-739799cbeb36" xlink:to="loc_us-gaap_SegmentDomain_1cf71d61-307d-47ec-a155-2189088df49f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_a775cbb8-30be-4574-aa94-55a953a8666b" xlink:href="xyl-20230630.xsd#xyl_MeasurementandControlSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_1cf71d61-307d-47ec-a155-2189088df49f" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_a775cbb8-30be-4574-aa94-55a953a8666b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_cb3f5423-58bd-452b-9c9e-c76d011f702d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_40e68537-8854-4acc-b022-9378094a8940" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_cb3f5423-58bd-452b-9c9e-c76d011f702d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cb3f5423-58bd-452b-9c9e-c76d011f702d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_cb3f5423-58bd-452b-9c9e-c76d011f702d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cb3f5423-58bd-452b-9c9e-c76d011f702d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3383719c-1906-4964-83de-99549b15b0f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_cb3f5423-58bd-452b-9c9e-c76d011f702d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3383719c-1906-4964-83de-99549b15b0f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_77fa6fa9-12cb-4c60-83eb-0c54bb379ff7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3383719c-1906-4964-83de-99549b15b0f9" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_77fa6fa9-12cb-4c60-83eb-0c54bb379ff7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsEffectofDeriativeInstrumentsonIncomeStatementandStatementofComprehensiveIncomeDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#DerivativeFinancialInstrumentsEffectofDeriativeInstrumentsonIncomeStatementandStatementofComprehensiveIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsEffectofDeriativeInstrumentsonIncomeStatementandStatementofComprehensiveIncomeDetails" xlink:type="extended" id="ib197f90fabc241f3bf88d388a0ffd809_DerivativeFinancialInstrumentsEffectofDeriativeInstrumentsonIncomeStatementandStatementofComprehensiveIncomeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_5232a13e-14db-4a28-b073-a22d6e5581cf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract_16bdb27c-82a3-46ad-b466-fa87aef7be8d" xlink:href="xyl-20230630.xsd#xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_5232a13e-14db-4a28-b073-a22d6e5581cf" xlink:to="loc_xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract_16bdb27c-82a3-46ad-b466-fa87aef7be8d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnForeignCurrencyDerivativesNetBeforeTax_092431c9-615b-4257-ae67-7b76fe30e0c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrealizedGainLossOnForeignCurrencyDerivativesNetBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract_16bdb27c-82a3-46ad-b466-fa87aef7be8d" xlink:to="loc_us-gaap_UnrealizedGainLossOnForeignCurrencyDerivativesNetBeforeTax_092431c9-615b-4257-ae67-7b76fe30e0c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_eec87e4b-1269-4571-a6ff-7eb8457f6527" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract_16bdb27c-82a3-46ad-b466-fa87aef7be8d" xlink:to="loc_us-gaap_Revenues_eec87e4b-1269-4571-a6ff-7eb8457f6527" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_cf50f925-795e-43b6-b510-ff19789adcfe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract_16bdb27c-82a3-46ad-b466-fa87aef7be8d" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_cf50f925-795e-43b6-b510-ff19789adcfe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_b7e711db-1016-47a5-8cc3-06ffdedbe3f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_5232a13e-14db-4a28-b073-a22d6e5581cf" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_b7e711db-1016-47a5-8cc3-06ffdedbe3f1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_9c07f8a0-fb98-4830-9e32-330303db879a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_b7e711db-1016-47a5-8cc3-06ffdedbe3f1" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_9c07f8a0-fb98-4830-9e32-330303db879a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_9c07f8a0-fb98-4830-9e32-330303db879a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_9c07f8a0-fb98-4830-9e32-330303db879a" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_9c07f8a0-fb98-4830-9e32-330303db879a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_d38f4c69-a301-4772-a37e-6f1657bb16a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_9c07f8a0-fb98-4830-9e32-330303db879a" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_d38f4c69-a301-4772-a37e-6f1657bb16a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseMember_7009a02d-23c8-4f6f-bf6b-b12370edb847" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_d38f4c69-a301-4772-a37e-6f1657bb16a7" xlink:to="loc_us-gaap_InterestExpenseMember_7009a02d-23c8-4f6f-bf6b-b12370edb847" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_811a04d8-262e-4fde-a540-bcb58790cb55" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_d38f4c69-a301-4772-a37e-6f1657bb16a7" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_811a04d8-262e-4fde-a540-bcb58790cb55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_6330412a-19c8-4027-ba91-33ade55b6e45" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_b7e711db-1016-47a5-8cc3-06ffdedbe3f1" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_6330412a-19c8-4027-ba91-33ade55b6e45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_6330412a-19c8-4027-ba91-33ade55b6e45_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_6330412a-19c8-4027-ba91-33ade55b6e45" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_6330412a-19c8-4027-ba91-33ade55b6e45_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_8fbf16b2-ea86-44ff-b8ea-a15243d97bae" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_6330412a-19c8-4027-ba91-33ade55b6e45" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_8fbf16b2-ea86-44ff-b8ea-a15243d97bae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeMember_6b3f2b9c-7e55-4a1f-8767-9af484a82322" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_8fbf16b2-ea86-44ff-b8ea-a15243d97bae" xlink:to="loc_us-gaap_OtherComprehensiveIncomeMember_6b3f2b9c-7e55-4a1f-8767-9af484a82322" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_10100e47-a3c2-4fb0-b479-641c18cbc962" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_b7e711db-1016-47a5-8cc3-06ffdedbe3f1" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_10100e47-a3c2-4fb0-b479-641c18cbc962" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_10100e47-a3c2-4fb0-b479-641c18cbc962_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_10100e47-a3c2-4fb0-b479-641c18cbc962" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_10100e47-a3c2-4fb0-b479-641c18cbc962_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_a0920fcf-7736-40a7-9954-8dc78ef2c481" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_10100e47-a3c2-4fb0-b479-641c18cbc962" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_a0920fcf-7736-40a7-9954-8dc78ef2c481" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_060dc76a-2c65-42f6-ae0e-63de59553afa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_a0920fcf-7736-40a7-9954-8dc78ef2c481" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_060dc76a-2c65-42f6-ae0e-63de59553afa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_8177d52e-1d32-4359-9714-aef81b02dff8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_b7e711db-1016-47a5-8cc3-06ffdedbe3f1" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_8177d52e-1d32-4359-9714-aef81b02dff8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_8177d52e-1d32-4359-9714-aef81b02dff8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_8177d52e-1d32-4359-9714-aef81b02dff8" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_8177d52e-1d32-4359-9714-aef81b02dff8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_9b516ee8-26c9-484e-ba57-850eb5fe822e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_8177d52e-1d32-4359-9714-aef81b02dff8" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_9b516ee8-26c9-484e-ba57-850eb5fe822e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_c2387bf5-b3b2-4668-a6d6-b7bb688ae998" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_9b516ee8-26c9-484e-ba57-850eb5fe822e" xlink:to="loc_us-gaap_ForeignExchangeContractMember_c2387bf5-b3b2-4668-a6d6-b7bb688ae998" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CrossCurrencyInterestRateContractMember_accbf729-a21c-4b24-a7f9-4a426e03f4a1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CrossCurrencyInterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_9b516ee8-26c9-484e-ba57-850eb5fe822e" xlink:to="loc_us-gaap_CrossCurrencyInterestRateContractMember_accbf729-a21c-4b24-a7f9-4a426e03f4a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_ForeignCurrencyDenominatedDebtMember_4c64fe0b-94a4-4518-a4dc-23a7f1040129" xlink:href="xyl-20230630.xsd#xyl_ForeignCurrencyDenominatedDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_9b516ee8-26c9-484e-ba57-850eb5fe822e" xlink:to="loc_xyl_ForeignCurrencyDenominatedDebtMember_4c64fe0b-94a4-4518-a4dc-23a7f1040129" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_e3abf2bf-6094-4c60-9647-c72132dfab7b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_b7e711db-1016-47a5-8cc3-06ffdedbe3f1" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_e3abf2bf-6094-4c60-9647-c72132dfab7b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_e3abf2bf-6094-4c60-9647-c72132dfab7b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_e3abf2bf-6094-4c60-9647-c72132dfab7b" xlink:to="loc_us-gaap_HedgingRelationshipDomain_e3abf2bf-6094-4c60-9647-c72132dfab7b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_21e1913c-da1d-48bd-acfc-0387d480a93a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_e3abf2bf-6094-4c60-9647-c72132dfab7b" xlink:to="loc_us-gaap_HedgingRelationshipDomain_21e1913c-da1d-48bd-acfc-0387d480a93a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_5ceea51c-f826-4cd3-b90e-8fac0f15e4ff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_21e1913c-da1d-48bd-acfc-0387d480a93a" xlink:to="loc_us-gaap_CashFlowHedgingMember_5ceea51c-f826-4cd3-b90e-8fac0f15e4ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueHedgingMember_cddfa042-159e-4dc7-b3af-d8218fc66878" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_21e1913c-da1d-48bd-acfc-0387d480a93a" xlink:to="loc_us-gaap_FairValueHedgingMember_cddfa042-159e-4dc7-b3af-d8218fc66878" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsBalanceSheetLocationofDerivativeInstrumentsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#DerivativeFinancialInstrumentsBalanceSheetLocationofDerivativeInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsBalanceSheetLocationofDerivativeInstrumentsDetails" xlink:type="extended" id="i1ab2b4eb9ccc4064b7525d0bff3f1ef8_DerivativeFinancialInstrumentsBalanceSheetLocationofDerivativeInstrumentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_e6bb2067-27a8-41af-a380-1893735fd094" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue_3de617fb-d505-400e-a9f7-5e6154133887" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_e6bb2067-27a8-41af-a380-1893735fd094" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue_3de617fb-d505-400e-a9f7-5e6154133887" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeLiabilityAtFairValue_8aba8833-1629-42f9-b2e0-13ed9740c5f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignCurrencyCashFlowHedgeLiabilityAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_e6bb2067-27a8-41af-a380-1893735fd094" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeLiabilityAtFairValue_8aba8833-1629-42f9-b2e0-13ed9740c5f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_351bf7e7-458e-4de7-b768-14f43ecd270c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_e6bb2067-27a8-41af-a380-1893735fd094" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_351bf7e7-458e-4de7-b768-14f43ecd270c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_f065315b-03b1-40a6-bc7e-3657769767e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_351bf7e7-458e-4de7-b768-14f43ecd270c" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_f065315b-03b1-40a6-bc7e-3657769767e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_f065315b-03b1-40a6-bc7e-3657769767e9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_f065315b-03b1-40a6-bc7e-3657769767e9" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_f065315b-03b1-40a6-bc7e-3657769767e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_a09a23e7-5de8-4bea-ba39-a6ba89649f99" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_f065315b-03b1-40a6-bc7e-3657769767e9" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_a09a23e7-5de8-4bea-ba39-a6ba89649f99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentAssetsMember_87578d60-2a0a-44ec-9f99-e3991fd3aab1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_a09a23e7-5de8-4bea-ba39-a6ba89649f99" xlink:to="loc_us-gaap_OtherCurrentAssetsMember_87578d60-2a0a-44ec-9f99-e3991fd3aab1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentAssetsMember_4c110d0f-353a-49c8-bd07-b0069687560d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNoncurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_a09a23e7-5de8-4bea-ba39-a6ba89649f99" xlink:to="loc_us-gaap_OtherNoncurrentAssetsMember_4c110d0f-353a-49c8-bd07-b0069687560d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentLiabilitiesMember_e8b29c73-5476-4c20-91f1-483b203b47cf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_a09a23e7-5de8-4bea-ba39-a6ba89649f99" xlink:to="loc_us-gaap_OtherCurrentLiabilitiesMember_e8b29c73-5476-4c20-91f1-483b203b47cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_efe51d16-0a52-46ee-8270-1cbf630f7612" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_a09a23e7-5de8-4bea-ba39-a6ba89649f99" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_efe51d16-0a52-46ee-8270-1cbf630f7612" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_cad79570-e94e-46ee-bb24-48f807c29729" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_351bf7e7-458e-4de7-b768-14f43ecd270c" xlink:to="loc_us-gaap_HedgingDesignationAxis_cad79570-e94e-46ee-bb24-48f807c29729" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_cad79570-e94e-46ee-bb24-48f807c29729_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_cad79570-e94e-46ee-bb24-48f807c29729" xlink:to="loc_us-gaap_HedgingDesignationDomain_cad79570-e94e-46ee-bb24-48f807c29729_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_0feb4461-c614-4bf3-86c6-9905bbcb3052" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_cad79570-e94e-46ee-bb24-48f807c29729" xlink:to="loc_us-gaap_HedgingDesignationDomain_0feb4461-c614-4bf3-86c6-9905bbcb3052" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_74cf58cb-e019-417c-b9ad-6593fbc51d1e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_0feb4461-c614-4bf3-86c6-9905bbcb3052" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_74cf58cb-e019-417c-b9ad-6593fbc51d1e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_6ecaf8d5-b375-411d-bcfa-2d3066492cad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_351bf7e7-458e-4de7-b768-14f43ecd270c" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_6ecaf8d5-b375-411d-bcfa-2d3066492cad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_6ecaf8d5-b375-411d-bcfa-2d3066492cad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_6ecaf8d5-b375-411d-bcfa-2d3066492cad" xlink:to="loc_us-gaap_HedgingRelationshipDomain_6ecaf8d5-b375-411d-bcfa-2d3066492cad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_733c4548-ba8c-4228-aa53-dd274ea5fe16" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_6ecaf8d5-b375-411d-bcfa-2d3066492cad" xlink:to="loc_us-gaap_HedgingRelationshipDomain_733c4548-ba8c-4228-aa53-dd274ea5fe16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_15aee3a7-59fe-4b6c-b97a-8ac90d27233b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_733c4548-ba8c-4228-aa53-dd274ea5fe16" xlink:to="loc_us-gaap_CashFlowHedgingMember_15aee3a7-59fe-4b6c-b97a-8ac90d27233b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsTextualDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#DerivativeFinancialInstrumentsTextualDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsTextualDetails" xlink:type="extended" id="i909e2947978242b7915a4d380b9a92cd_DerivativeFinancialInstrumentsTextualDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_7925c45a-3e45-4792-8aba-2430cadf580b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_809ffb97-6cfc-46b0-815b-2db39b221084" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_7925c45a-3e45-4792-8aba-2430cadf580b" xlink:to="loc_us-gaap_DerivativeNotionalAmount_809ffb97-6cfc-46b0-815b-2db39b221084" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_d2b940a1-12b2-497f-b07c-1a821c18b2a1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_7925c45a-3e45-4792-8aba-2430cadf580b" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_d2b940a1-12b2-497f-b07c-1a821c18b2a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_6e663f9f-9988-4190-aa98-d41427518636" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_7925c45a-3e45-4792-8aba-2430cadf580b" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_6e663f9f-9988-4190-aa98-d41427518636" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_c6271f27-0bfe-4608-b86d-c39448eaae5c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_7925c45a-3e45-4792-8aba-2430cadf580b" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_c6271f27-0bfe-4608-b86d-c39448eaae5c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_bf6dad0d-ff65-48cb-83a3-07513f5c26be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_7925c45a-3e45-4792-8aba-2430cadf580b" xlink:to="loc_us-gaap_LongTermDebtFairValue_bf6dad0d-ff65-48cb-83a3-07513f5c26be" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_e3622655-3456-446d-a84e-31369ee0ef03" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_7925c45a-3e45-4792-8aba-2430cadf580b" xlink:to="loc_us-gaap_DerivativeTable_e3622655-3456-446d-a84e-31369ee0ef03" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_33fb38f0-abf7-4b53-9a6d-49b0919fc845" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e3622655-3456-446d-a84e-31369ee0ef03" xlink:to="loc_us-gaap_DebtInstrumentAxis_33fb38f0-abf7-4b53-9a6d-49b0919fc845" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_33fb38f0-abf7-4b53-9a6d-49b0919fc845_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_33fb38f0-abf7-4b53-9a6d-49b0919fc845" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_33fb38f0-abf7-4b53-9a6d-49b0919fc845_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_41c22ba7-de14-4886-8b49-e79a8c183357" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_33fb38f0-abf7-4b53-9a6d-49b0919fc845" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_41c22ba7-de14-4886-8b49-e79a8c183357" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_19df646e-43ed-49ea-a5c6-8955122694f8" xlink:href="xyl-20230630.xsd#xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_41c22ba7-de14-4886-8b49-e79a8c183357" xlink:to="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_19df646e-43ed-49ea-a5c6-8955122694f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_3bdb6e93-efdf-457d-a100-2246009f2574" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e3622655-3456-446d-a84e-31369ee0ef03" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_3bdb6e93-efdf-457d-a100-2246009f2574" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_3bdb6e93-efdf-457d-a100-2246009f2574_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_3bdb6e93-efdf-457d-a100-2246009f2574" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_3bdb6e93-efdf-457d-a100-2246009f2574_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_05936720-0a22-4f83-a97c-79aeae809f7e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_3bdb6e93-efdf-457d-a100-2246009f2574" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_05936720-0a22-4f83-a97c-79aeae809f7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_e3d6bf7c-f423-43f2-ba09-00ba68ea7d02" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_05936720-0a22-4f83-a97c-79aeae809f7e" xlink:to="loc_us-gaap_SeniorNotesMember_e3d6bf7c-f423-43f2-ba09-00ba68ea7d02" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_252ebbae-1026-4f07-bd75-065009505388" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e3622655-3456-446d-a84e-31369ee0ef03" xlink:to="loc_us-gaap_HedgingDesignationAxis_252ebbae-1026-4f07-bd75-065009505388" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_252ebbae-1026-4f07-bd75-065009505388_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_252ebbae-1026-4f07-bd75-065009505388" xlink:to="loc_us-gaap_HedgingDesignationDomain_252ebbae-1026-4f07-bd75-065009505388_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_bfc48703-fdc6-435f-ae7b-70075a0a2e83" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_252ebbae-1026-4f07-bd75-065009505388" xlink:to="loc_us-gaap_HedgingDesignationDomain_bfc48703-fdc6-435f-ae7b-70075a0a2e83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_260070d7-4823-41c3-9a3f-f2114cd59bd3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_bfc48703-fdc6-435f-ae7b-70075a0a2e83" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_260070d7-4823-41c3-9a3f-f2114cd59bd3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_23456753-4b65-4ab4-a87d-7498c8afd137" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e3622655-3456-446d-a84e-31369ee0ef03" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_23456753-4b65-4ab4-a87d-7498c8afd137" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_23456753-4b65-4ab4-a87d-7498c8afd137_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_23456753-4b65-4ab4-a87d-7498c8afd137" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_23456753-4b65-4ab4-a87d-7498c8afd137_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_7914c9b8-b647-440a-b1fc-f06181bedbb2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_23456753-4b65-4ab4-a87d-7498c8afd137" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_7914c9b8-b647-440a-b1fc-f06181bedbb2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_57a7f105-8999-45e9-92df-c198a28cf549" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_7914c9b8-b647-440a-b1fc-f06181bedbb2" xlink:to="loc_us-gaap_ForeignExchangeContractMember_57a7f105-8999-45e9-92df-c198a28cf549" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SellUSDBuyEURMember_8584a354-b5d5-416b-8344-b64979e92522" xlink:href="xyl-20230630.xsd#xyl_SellUSDBuyEURMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_57a7f105-8999-45e9-92df-c198a28cf549" xlink:to="loc_xyl_SellUSDBuyEURMember_8584a354-b5d5-416b-8344-b64979e92522" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BuyKRSellEURMember_c3757e13-33d8-4245-b420-5cecdd7c4ca7" xlink:href="xyl-20230630.xsd#xyl_BuyKRSellEURMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_57a7f105-8999-45e9-92df-c198a28cf549" xlink:to="loc_xyl_BuyKRSellEURMember_c3757e13-33d8-4245-b420-5cecdd7c4ca7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SellGBPBuyEURMember_bfcd2764-2aab-435d-8ad5-138036aee73b" xlink:href="xyl-20230630.xsd#xyl_SellGBPBuyEURMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_57a7f105-8999-45e9-92df-c198a28cf549" xlink:to="loc_xyl_SellGBPBuyEURMember_bfcd2764-2aab-435d-8ad5-138036aee73b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SellCDNBuyEURMember_4db271cb-10cc-4e90-ba1b-be1eb24c5dee" xlink:href="xyl-20230630.xsd#xyl_SellCDNBuyEURMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_57a7f105-8999-45e9-92df-c198a28cf549" xlink:to="loc_xyl_SellCDNBuyEURMember_4db271cb-10cc-4e90-ba1b-be1eb24c5dee" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BuyUSDSellCDNMember_1b90766e-e80f-4eb0-a283-1725afc30d77" xlink:href="xyl-20230630.xsd#xyl_BuyUSDSellCDNMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_57a7f105-8999-45e9-92df-c198a28cf549" xlink:to="loc_xyl_BuyUSDSellCDNMember_1b90766e-e80f-4eb0-a283-1725afc30d77" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SellASDBuyEuroMember_939c4b1a-bb04-43f0-b25b-a4d2299d5d62" xlink:href="xyl-20230630.xsd#xyl_SellASDBuyEuroMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_57a7f105-8999-45e9-92df-c198a28cf549" xlink:to="loc_xyl_SellASDBuyEuroMember_939c4b1a-bb04-43f0-b25b-a4d2299d5d62" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_BuyPLNSellEURMember_6ec56ffc-a770-4a2e-a174-b35838de8676" xlink:href="xyl-20230630.xsd#xyl_BuyPLNSellEURMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_57a7f105-8999-45e9-92df-c198a28cf549" xlink:to="loc_xyl_BuyPLNSellEURMember_6ec56ffc-a770-4a2e-a174-b35838de8676" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CrossCurrencyInterestRateContractMember_7dffd60d-a2f5-409e-9017-107842744dc8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CrossCurrencyInterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_7914c9b8-b647-440a-b1fc-f06181bedbb2" xlink:to="loc_us-gaap_CrossCurrencyInterestRateContractMember_7dffd60d-a2f5-409e-9017-107842744dc8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/CreditFacilitiesandDebtSummaryofDebtOutstandingDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#CreditFacilitiesandDebtSummaryofDebtOutstandingDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/CreditFacilitiesandDebtSummaryofDebtOutstandingDetails" xlink:type="extended" id="idf5608c8a8ab4d0e954c388ff6a4ccbc_CreditFacilitiesandDebtSummaryofDebtOutstandingDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_a43ecf7b-9fac-4710-8fd1-fa62da1cd275" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_59d11208-8eaa-4347-a48e-c246f726c1c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a43ecf7b-9fac-4710-8fd1-fa62da1cd275" xlink:to="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_59d11208-8eaa-4347-a48e-c246f726c1c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_d48df1aa-b1c7-4ffc-9bd1-7642704141d5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_59d11208-8eaa-4347-a48e-c246f726c1c8" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_d48df1aa-b1c7-4ffc-9bd1-7642704141d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_5020d3ff-9165-49b6-a1df-9a5294ee0bff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_59d11208-8eaa-4347-a48e-c246f726c1c8" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_5020d3ff-9165-49b6-a1df-9a5294ee0bff" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_eaa4740f-6228-4669-b273-d05fc642fec8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrincipalAmountOutstandingOnLoansSecuritized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_59d11208-8eaa-4347-a48e-c246f726c1c8" xlink:to="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_eaa4740f-6228-4669-b273-d05fc642fec8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_21122175-396a-4369-818b-18536991f9f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_59d11208-8eaa-4347-a48e-c246f726c1c8" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_21122175-396a-4369-818b-18536991f9f8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_0ef62500-1d51-43d5-a917-3b8b10fd51fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_59d11208-8eaa-4347-a48e-c246f726c1c8" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_0ef62500-1d51-43d5-a917-3b8b10fd51fa" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtCurrent_b2dff777-91fc-42cf-874f-c9d864fd9d69" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_59d11208-8eaa-4347-a48e-c246f726c1c8" xlink:to="loc_us-gaap_DebtCurrent_b2dff777-91fc-42cf-874f-c9d864fd9d69" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_eec99f20-4400-409d-a385-a8e3b3ed8bdf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_59d11208-8eaa-4347-a48e-c246f726c1c8" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_eec99f20-4400-409d-a385-a8e3b3ed8bdf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_36270b00-c1d2-4f7c-99b9-f779ecd29dd3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_59d11208-8eaa-4347-a48e-c246f726c1c8" xlink:to="loc_us-gaap_LongTermDebtFairValue_36270b00-c1d2-4f7c-99b9-f779ecd29dd3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_dd7b2bc4-2665-4863-b489-cb0067729951" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a43ecf7b-9fac-4710-8fd1-fa62da1cd275" xlink:to="loc_us-gaap_DebtInstrumentTable_dd7b2bc4-2665-4863-b489-cb0067729951" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_5021930b-7eeb-4cb7-a459-af07f6485bf6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_dd7b2bc4-2665-4863-b489-cb0067729951" xlink:to="loc_us-gaap_DebtInstrumentAxis_5021930b-7eeb-4cb7-a459-af07f6485bf6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_5021930b-7eeb-4cb7-a459-af07f6485bf6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_5021930b-7eeb-4cb7-a459-af07f6485bf6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_5021930b-7eeb-4cb7-a459-af07f6485bf6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_9fb7f913-860e-4b98-9fa2-825163c7ac8f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_5021930b-7eeb-4cb7-a459-af07f6485bf6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_9fb7f913-860e-4b98-9fa2-825163c7ac8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandTwentySixMember_6dbcd0e8-087f-4e28-b59d-1c0f15f17b8b" xlink:href="xyl-20230630.xsd#xyl_SeniorNotesDueTwoThousandTwentySixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9fb7f913-860e-4b98-9fa2-825163c7ac8f" xlink:to="loc_xyl_SeniorNotesDueTwoThousandTwentySixMember_6dbcd0e8-087f-4e28-b59d-1c0f15f17b8b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwentyTwentyEightMember_4c1b06bf-01ed-4bbc-9036-a2c25c601254" xlink:href="xyl-20230630.xsd#xyl_SeniorNotesDueTwentyTwentyEightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9fb7f913-860e-4b98-9fa2-825163c7ac8f" xlink:to="loc_xyl_SeniorNotesDueTwentyTwentyEightMember_4c1b06bf-01ed-4bbc-9036-a2c25c601254" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwentyThirtyOneMember_b976ef95-1790-4307-9513-3148af7eaa25" xlink:href="xyl-20230630.xsd#xyl_SeniorNotesDueTwentyThirtyOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9fb7f913-860e-4b98-9fa2-825163c7ac8f" xlink:to="loc_xyl_SeniorNotesDueTwentyThirtyOneMember_b976ef95-1790-4307-9513-3148af7eaa25" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandFortySixMember_a460313d-8058-4532-ba55-3d0891db6bad" xlink:href="xyl-20230630.xsd#xyl_SeniorNotesDueTwoThousandFortySixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9fb7f913-860e-4b98-9fa2-825163c7ac8f" xlink:to="loc_xyl_SeniorNotesDueTwoThousandFortySixMember_a460313d-8058-4532-ba55-3d0891db6bad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_7bdd5003-9033-407e-97a2-a1ccffa32e32" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9fb7f913-860e-4b98-9fa2-825163c7ac8f" xlink:to="loc_us-gaap_CommercialPaperMember_7bdd5003-9033-407e-97a2-a1ccffa32e32" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EquipmentFinancingMember_1fe88920-b776-4170-ad64-c4c4945770a6" xlink:href="xyl-20230630.xsd#xyl_EquipmentFinancingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9fb7f913-860e-4b98-9fa2-825163c7ac8f" xlink:to="loc_xyl_EquipmentFinancingMember_1fe88920-b776-4170-ad64-c4c4945770a6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SecuritizationFacilityDue2024Member_459bda83-f908-4f92-98f3-040226544f51" xlink:href="xyl-20230630.xsd#xyl_SecuritizationFacilityDue2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9fb7f913-860e-4b98-9fa2-825163c7ac8f" xlink:to="loc_xyl_SecuritizationFacilityDue2024Member_459bda83-f908-4f92-98f3-040226544f51" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_TermLoanMember_c55d90df-602e-481d-90df-0e629f25dc3b" xlink:href="xyl-20230630.xsd#xyl_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9fb7f913-860e-4b98-9fa2-825163c7ac8f" xlink:to="loc_xyl_TermLoanMember_c55d90df-602e-481d-90df-0e629f25dc3b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_7125dac1-2479-421d-a922-226fd2f75546" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_dd7b2bc4-2665-4863-b489-cb0067729951" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_7125dac1-2479-421d-a922-226fd2f75546" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_7125dac1-2479-421d-a922-226fd2f75546_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_7125dac1-2479-421d-a922-226fd2f75546" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_7125dac1-2479-421d-a922-226fd2f75546_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_37ff9114-2cf0-4bb3-a73e-42dc33e8b3c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_7125dac1-2479-421d-a922-226fd2f75546" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_37ff9114-2cf0-4bb3-a73e-42dc33e8b3c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_142243f2-3de7-4e19-b6bc-1272fa343582" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_37ff9114-2cf0-4bb3-a73e-42dc33e8b3c6" xlink:to="loc_us-gaap_SecuredDebtMember_142243f2-3de7-4e19-b6bc-1272fa343582" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorLoansMember_36148833-6452-48cb-aa78-43e96138fac0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_37ff9114-2cf0-4bb3-a73e-42dc33e8b3c6" xlink:to="loc_us-gaap_SeniorLoansMember_36148833-6452-48cb-aa78-43e96138fac0" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/CreditFacilitiesandDebtTextualsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#CreditFacilitiesandDebtTextualsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/CreditFacilitiesandDebtTextualsDetails" xlink:type="extended" id="i963b8b304e7e4ba4be2ec5d8077b5852_CreditFacilitiesandDebtTextualsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_ad9c5dfb-136b-4dd9-b66e-1285d456f98e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_us-gaap_LongTermDebtFairValue_ad9c5dfb-136b-4dd9-b66e-1285d456f98e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_58f134fe-90cc-4526-baf2-02151dc605aa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_58f134fe-90cc-4526-baf2-02151dc605aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_eaffd71b-a0a1-4182-ac0c-b113f86b29ca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_eaffd71b-a0a1-4182-ac0c-b113f86b29ca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_7a1ea466-ee6a-4787-a324-d4615b9f5232" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_7a1ea466-ee6a-4787-a324-d4615b9f5232" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_RedemptionPricePercentage_1491c381-aae5-4085-8058-67b1b892cc91" xlink:href="xyl-20230630.xsd#xyl_RedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_xyl_RedemptionPricePercentage_1491c381-aae5-4085-8058-67b1b892cc91" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_ed7e89d0-a736-44c0-b1d1-73d208719bb3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_us-gaap_DebtInstrumentTerm_ed7e89d0-a736-44c0-b1d1-73d208719bb3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_b407e94f-16e3-4579-9144-010fa56c8ae9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_b407e94f-16e3-4579-9144-010fa56c8ae9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacity_3cf95b2e-549d-46ff-8108-d3c7770654e7" xlink:href="xyl-20230630.xsd#xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacity_3cf95b2e-549d-46ff-8108-d3c7770654e7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacityTotal_154cc413-6820-4b35-93b8-84cf60b1b362" xlink:href="xyl-20230630.xsd#xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacityTotal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacityTotal_154cc413-6820-4b35-93b8-84cf60b1b362" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_DebtInstrumentCovenantMaximumLeverageRatioFourConsecutiveQuartersAfterMaterialAcquisition_65558244-f395-4c98-8b75-029ccabcd661" xlink:href="xyl-20230630.xsd#xyl_DebtInstrumentCovenantMaximumLeverageRatioFourConsecutiveQuartersAfterMaterialAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_xyl_DebtInstrumentCovenantMaximumLeverageRatioFourConsecutiveQuartersAfterMaterialAcquisition_65558244-f395-4c98-8b75-029ccabcd661" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_DebtInstrumentCovenantMaximumLeverageRatioFourConsecutiveQuartersBeforeAdditionalMaterialAcquisition_f6c1e6b4-da84-4029-bb0a-3b60f8b7aaf1" xlink:href="xyl-20230630.xsd#xyl_DebtInstrumentCovenantMaximumLeverageRatioFourConsecutiveQuartersBeforeAdditionalMaterialAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_xyl_DebtInstrumentCovenantMaximumLeverageRatioFourConsecutiveQuartersBeforeAdditionalMaterialAcquisition_f6c1e6b4-da84-4029-bb0a-3b60f8b7aaf1" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_0134154b-454f-4ae3-b947-5ced9ea70cd6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrincipalAmountOutstandingOnLoansSecuritized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_0134154b-454f-4ae3-b947-5ced9ea70cd6" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_d2560396-3436-42f2-bd64-f4b29b43bffe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3b53df4b-615e-4eb6-957b-48ca92ecf171" xlink:to="loc_us-gaap_DebtInstrumentTable_d2560396-3436-42f2-bd64-f4b29b43bffe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_7b930fa7-42b3-44ef-8243-488a45a17592" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d2560396-3436-42f2-bd64-f4b29b43bffe" xlink:to="loc_us-gaap_DebtInstrumentAxis_7b930fa7-42b3-44ef-8243-488a45a17592" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_7b930fa7-42b3-44ef-8243-488a45a17592_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_7b930fa7-42b3-44ef-8243-488a45a17592" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_7b930fa7-42b3-44ef-8243-488a45a17592_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_7b930fa7-42b3-44ef-8243-488a45a17592" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_99aba7cd-fa68-425c-8acb-5c4be925dee7" xlink:href="xyl-20230630.xsd#xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_99aba7cd-fa68-425c-8acb-5c4be925dee7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandTwentySixMember_c2251df7-45b3-4979-9eb4-1cde0566cd0a" xlink:href="xyl-20230630.xsd#xyl_SeniorNotesDueTwoThousandTwentySixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_xyl_SeniorNotesDueTwoThousandTwentySixMember_c2251df7-45b3-4979-9eb4-1cde0566cd0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandFortySixMember_95e07167-d34c-482e-ac2c-9a60c05dbff3" xlink:href="xyl-20230630.xsd#xyl_SeniorNotesDueTwoThousandFortySixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_xyl_SeniorNotesDueTwoThousandFortySixMember_95e07167-d34c-482e-ac2c-9a60c05dbff3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_FiveYearRevolvingCreditFacility2019Member_7ae510b7-22ab-414d-aa91-431c44e6325b" xlink:href="xyl-20230630.xsd#xyl_FiveYearRevolvingCreditFacility2019Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_xyl_FiveYearRevolvingCreditFacility2019Member_7ae510b7-22ab-414d-aa91-431c44e6325b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_USDollarCommercialPaperProgramMember_22c3f935-a44d-4744-980e-e42657ca0346" xlink:href="xyl-20230630.xsd#xyl_USDollarCommercialPaperProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_xyl_USDollarCommercialPaperProgramMember_22c3f935-a44d-4744-980e-e42657ca0346" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EuroCommercialPaperProgramMember_d9b573b7-60e7-48ae-a197-f6ac0a6d8470" xlink:href="xyl-20230630.xsd#xyl_EuroCommercialPaperProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_xyl_EuroCommercialPaperProgramMember_d9b573b7-60e7-48ae-a197-f6ac0a6d8470" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwentyTwentyEightMember_ecece4fd-6664-44bf-b3cb-56043d146813" xlink:href="xyl-20230630.xsd#xyl_SeniorNotesDueTwentyTwentyEightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_xyl_SeniorNotesDueTwentyTwentyEightMember_ecece4fd-6664-44bf-b3cb-56043d146813" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwentyThirtyOneMember_8fcf137a-0217-479c-ac46-5b2255f76565" xlink:href="xyl-20230630.xsd#xyl_SeniorNotesDueTwentyThirtyOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_xyl_SeniorNotesDueTwentyThirtyOneMember_8fcf137a-0217-479c-ac46-5b2255f76565" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_GreenBondMember_0802171f-43fe-4b32-81c6-657d02f80c07" xlink:href="xyl-20230630.xsd#xyl_GreenBondMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_xyl_GreenBondMember_0802171f-43fe-4b32-81c6-657d02f80c07" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_FiveYearRevolvingCreditFacility2023Member_f9ad681e-b59c-44be-8c2f-e8717f5258c4" xlink:href="xyl-20230630.xsd#xyl_FiveYearRevolvingCreditFacility2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_xyl_FiveYearRevolvingCreditFacility2023Member_f9ad681e-b59c-44be-8c2f-e8717f5258c4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_INGBankTermLoanFacilityMember_6d06d895-0e6b-49df-9eaf-7a128fc9f8dc" xlink:href="xyl-20230630.xsd#xyl_INGBankTermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_xyl_INGBankTermLoanFacilityMember_6d06d895-0e6b-49df-9eaf-7a128fc9f8dc" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_638723b9-111c-4e99-9405-9ae5e0e80925" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_737ed0c6-0997-4efb-9531-94705b8ef0cb" xlink:to="loc_us-gaap_CommercialPaperMember_638723b9-111c-4e99-9405-9ae5e0e80925" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_ca5694ea-92cd-4bd5-b51b-8bd2cd97d105" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d2560396-3436-42f2-bd64-f4b29b43bffe" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_ca5694ea-92cd-4bd5-b51b-8bd2cd97d105" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_ca5694ea-92cd-4bd5-b51b-8bd2cd97d105_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_ca5694ea-92cd-4bd5-b51b-8bd2cd97d105" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_ca5694ea-92cd-4bd5-b51b-8bd2cd97d105_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_345d50c4-32fd-448f-a6ef-7027991a6aef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_ca5694ea-92cd-4bd5-b51b-8bd2cd97d105" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_345d50c4-32fd-448f-a6ef-7027991a6aef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_e13c5edc-5388-4ae8-836e-89ecab255e0d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_345d50c4-32fd-448f-a6ef-7027991a6aef" xlink:to="loc_us-gaap_SeniorNotesMember_e13c5edc-5388-4ae8-836e-89ecab255e0d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_070691c0-4010-4be3-a67b-a26e04d26934" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_345d50c4-32fd-448f-a6ef-7027991a6aef" xlink:to="loc_us-gaap_LineOfCreditMember_070691c0-4010-4be3-a67b-a26e04d26934" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_65ec6f71-a1e7-4070-a173-01435564dea1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_345d50c4-32fd-448f-a6ef-7027991a6aef" xlink:to="loc_us-gaap_SecuredDebtMember_65ec6f71-a1e7-4070-a173-01435564dea1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_a0de19db-b3ef-4163-b130-9fa9811680ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d2560396-3436-42f2-bd64-f4b29b43bffe" xlink:to="loc_us-gaap_CreditFacilityAxis_a0de19db-b3ef-4163-b130-9fa9811680ce" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_a0de19db-b3ef-4163-b130-9fa9811680ce_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_a0de19db-b3ef-4163-b130-9fa9811680ce" xlink:to="loc_us-gaap_CreditFacilityDomain_a0de19db-b3ef-4163-b130-9fa9811680ce_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_645d8858-dd2e-4901-ba43-4cd7f2ed1cdc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_a0de19db-b3ef-4163-b130-9fa9811680ce" xlink:to="loc_us-gaap_CreditFacilityDomain_645d8858-dd2e-4901-ba43-4cd7f2ed1cdc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_9a814029-3a38-4222-a243-69e9bba0b950" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_645d8858-dd2e-4901-ba43-4cd7f2ed1cdc" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_9a814029-3a38-4222-a243-69e9bba0b950" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_e8b3486f-f58c-46a0-9682-e458d4c24100" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d2560396-3436-42f2-bd64-f4b29b43bffe" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_e8b3486f-f58c-46a0-9682-e458d4c24100" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e8b3486f-f58c-46a0-9682-e458d4c24100_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_e8b3486f-f58c-46a0-9682-e458d4c24100" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e8b3486f-f58c-46a0-9682-e458d4c24100_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a781700a-dfb4-4f15-9a42-bb87f72735c7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_e8b3486f-f58c-46a0-9682-e458d4c24100" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a781700a-dfb4-4f15-9a42-bb87f72735c7" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/CreditFacilitiesandDebtDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#CreditFacilitiesandDebtDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/CreditFacilitiesandDebtDetails" xlink:type="extended" id="ica20e3e542a3440fba020a595845fb3e_CreditFacilitiesandDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_d18ce176-e40f-4dcb-9dc4-17c307061747" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_GrossAssetsAbstract_ab48bcd7-4173-4056-9089-c0e43aa25801" xlink:href="xyl-20230630.xsd#xyl_GrossAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d18ce176-e40f-4dcb-9dc4-17c307061747" xlink:to="loc_xyl_GrossAssetsAbstract_ab48bcd7-4173-4056-9089-c0e43aa25801" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_d3962a6f-ca9e-45b6-8b2b-9a3fd503ccbc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_GrossAssetsAbstract_ab48bcd7-4173-4056-9089-c0e43aa25801" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_d3962a6f-ca9e-45b6-8b2b-9a3fd503ccbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGross_8a9914f7-00e2-4f93-bc99-7d50cc437867" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_GrossAssetsAbstract_ab48bcd7-4173-4056-9089-c0e43aa25801" xlink:to="loc_us-gaap_AccountsReceivableGross_8a9914f7-00e2-4f93-bc99-7d50cc437867" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_6d9cafee-dc5d-4937-b2ae-e953876e8356" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_GrossAssetsAbstract_ab48bcd7-4173-4056-9089-c0e43aa25801" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_6d9cafee-dc5d-4937-b2ae-e953876e8356" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_OtherNoncurrentAssetsBeforeDepreciation_d80fd9bc-57ff-4614-96c5-924a4e88efce" xlink:href="xyl-20230630.xsd#xyl_OtherNoncurrentAssetsBeforeDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_GrossAssetsAbstract_ab48bcd7-4173-4056-9089-c0e43aa25801" xlink:to="loc_xyl_OtherNoncurrentAssetsBeforeDepreciation_d80fd9bc-57ff-4614-96c5-924a4e88efce" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_AssetsBeforeDepreciation_ef6e3071-27ad-4894-b8c1-d25616f0cc7f" xlink:href="xyl-20230630.xsd#xyl_AssetsBeforeDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_GrossAssetsAbstract_ab48bcd7-4173-4056-9089-c0e43aa25801" xlink:to="loc_xyl_AssetsBeforeDepreciation_ef6e3071-27ad-4894-b8c1-d25616f0cc7f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_5fa13d20-1424-45ad-87d5-7c523c88ba43" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d18ce176-e40f-4dcb-9dc4-17c307061747" xlink:to="loc_us-gaap_AssetsAbstract_5fa13d20-1424-45ad-87d5-7c523c88ba43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_9df8f929-370a-4053-8f09-6840ee8eb9b3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_5fa13d20-1424-45ad-87d5-7c523c88ba43" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_9df8f929-370a-4053-8f09-6840ee8eb9b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_4a1a6a58-6bd5-4167-b339-5f14c013045f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_5fa13d20-1424-45ad-87d5-7c523c88ba43" xlink:to="loc_us-gaap_AccountsReceivableNet_4a1a6a58-6bd5-4167-b339-5f14c013045f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_841ff90f-b0a4-4985-991d-11a03161af7d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_1b16bc32-affd-49d3-bd76-52a9fc7eeef1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_5fa13d20-1424-45ad-87d5-7c523c88ba43" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_1b16bc32-affd-49d3-bd76-52a9fc7eeef1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_c7a96a6b-9268-4e34-b3bf-5ceab3fff6fb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_5fa13d20-1424-45ad-87d5-7c523c88ba43" xlink:to="loc_us-gaap_Assets_c7a96a6b-9268-4e34-b3bf-5ceab3fff6fb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_8e46cdcb-8c11-4e8f-a3ef-596dbf96da82" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrincipalAmountOutstandingOnLoansSecuritized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d18ce176-e40f-4dcb-9dc4-17c307061747" xlink:to="loc_us-gaap_PrincipalAmountOutstandingOnLoansSecuritized_8e46cdcb-8c11-4e8f-a3ef-596dbf96da82" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_6b1fde09-3b80-482e-8add-af5d81053533" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d18ce176-e40f-4dcb-9dc4-17c307061747" xlink:to="loc_us-gaap_DebtInstrumentTable_6b1fde09-3b80-482e-8add-af5d81053533" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_22588db7-6b37-4457-9d99-03e98245d15c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6b1fde09-3b80-482e-8add-af5d81053533" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_22588db7-6b37-4457-9d99-03e98245d15c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_22588db7-6b37-4457-9d99-03e98245d15c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_22588db7-6b37-4457-9d99-03e98245d15c" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_22588db7-6b37-4457-9d99-03e98245d15c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_e1109aad-9128-4788-80b2-77717699940b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_22588db7-6b37-4457-9d99-03e98245d15c" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_e1109aad-9128-4788-80b2-77717699940b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_8e614c5b-fe00-4f3b-8293-b9a8e992acf3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6b1fde09-3b80-482e-8add-af5d81053533" xlink:to="loc_us-gaap_DebtInstrumentAxis_8e614c5b-fe00-4f3b-8293-b9a8e992acf3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8e614c5b-fe00-4f3b-8293-b9a8e992acf3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_8e614c5b-fe00-4f3b-8293-b9a8e992acf3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8e614c5b-fe00-4f3b-8293-b9a8e992acf3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_d6c65b61-1b58-4cae-91e3-f668ce18bb37" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_8e614c5b-fe00-4f3b-8293-b9a8e992acf3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_d6c65b61-1b58-4cae-91e3-f668ce18bb37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EquipmentFinancingMember_525dd864-8f09-48bb-aa11-58f448ae64e9" xlink:href="xyl-20230630.xsd#xyl_EquipmentFinancingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d6c65b61-1b58-4cae-91e3-f668ce18bb37" xlink:to="loc_xyl_EquipmentFinancingMember_525dd864-8f09-48bb-aa11-58f448ae64e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_f3c0e61b-db56-48e4-9968-1e6be399fb66" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6b1fde09-3b80-482e-8add-af5d81053533" xlink:to="loc_us-gaap_VariableRateAxis_f3c0e61b-db56-48e4-9968-1e6be399fb66" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_f3c0e61b-db56-48e4-9968-1e6be399fb66_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_f3c0e61b-db56-48e4-9968-1e6be399fb66" xlink:to="loc_us-gaap_VariableRateDomain_f3c0e61b-db56-48e4-9968-1e6be399fb66_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_e8d5f751-650d-4b1a-b370-3b7fd4a99350" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_f3c0e61b-db56-48e4-9968-1e6be399fb66" xlink:to="loc_us-gaap_VariableRateDomain_e8d5f751-650d-4b1a-b370-3b7fd4a99350" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_34b05867-d635-45c6-a8fa-d5c5cc504d5e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6b1fde09-3b80-482e-8add-af5d81053533" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_34b05867-d635-45c6-a8fa-d5c5cc504d5e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_34b05867-d635-45c6-a8fa-d5c5cc504d5e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_34b05867-d635-45c6-a8fa-d5c5cc504d5e" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_34b05867-d635-45c6-a8fa-d5c5cc504d5e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_c2ca1d76-71f8-4854-9a05-5b84efbc0d0b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_34b05867-d635-45c6-a8fa-d5c5cc504d5e" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_c2ca1d76-71f8-4854-9a05-5b84efbc0d0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_73c77822-fd32-4375-b879-f3c180a313b7" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6b1fde09-3b80-482e-8add-af5d81053533" xlink:to="loc_srt_RangeAxis_73c77822-fd32-4375-b879-f3c180a313b7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_73c77822-fd32-4375-b879-f3c180a313b7_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_73c77822-fd32-4375-b879-f3c180a313b7" xlink:to="loc_srt_RangeMember_73c77822-fd32-4375-b879-f3c180a313b7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a5fe01c2-5ac3-4a4c-91f9-a4f59f2f7234" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_73c77822-fd32-4375-b879-f3c180a313b7" xlink:to="loc_srt_RangeMember_a5fe01c2-5ac3-4a4c-91f9-a4f59f2f7234" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralAxis_3e067980-a281-4258-92a9-3d85563a1c75" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CollateralAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6b1fde09-3b80-482e-8add-af5d81053533" xlink:to="loc_us-gaap_CollateralAxis_3e067980-a281-4258-92a9-3d85563a1c75" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralDomain_3e067980-a281-4258-92a9-3d85563a1c75_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CollateralDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CollateralAxis_3e067980-a281-4258-92a9-3d85563a1c75" xlink:to="loc_us-gaap_CollateralDomain_3e067980-a281-4258-92a9-3d85563a1c75_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralDomain_9dc62249-b63d-4a89-8708-5736e5e2cb7e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CollateralDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CollateralAxis_3e067980-a281-4258-92a9-3d85563a1c75" xlink:to="loc_us-gaap_CollateralDomain_9dc62249-b63d-4a89-8708-5736e5e2cb7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetPledgedAsCollateralMember_500d957c-9fbf-4658-99b9-2e3cdeef33be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetPledgedAsCollateralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollateralDomain_9dc62249-b63d-4a89-8708-5736e5e2cb7e" xlink:to="loc_us-gaap_AssetPledgedAsCollateralMember_500d957c-9fbf-4658-99b9-2e3cdeef33be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_32c91e8f-8b40-48b9-9c8d-c7f0369b2207" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6b1fde09-3b80-482e-8add-af5d81053533" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_32c91e8f-8b40-48b9-9c8d-c7f0369b2207" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_32c91e8f-8b40-48b9-9c8d-c7f0369b2207_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_32c91e8f-8b40-48b9-9c8d-c7f0369b2207" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_32c91e8f-8b40-48b9-9c8d-c7f0369b2207_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_78b1f683-d8a2-4161-8593-626e68fcb3ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_32c91e8f-8b40-48b9-9c8d-c7f0369b2207" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_78b1f683-d8a2-4161-8593-626e68fcb3ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_EvoquaAcquisitionMember_ea1efa7f-130a-4c06-b81b-21195a4ac802" xlink:href="xyl-20230630.xsd#xyl_EvoquaAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_78b1f683-d8a2-4161-8593-626e68fcb3ed" xlink:to="loc_xyl_EvoquaAcquisitionMember_ea1efa7f-130a-4c06-b81b-21195a4ac802" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/PostretirementBenefitPlansSummaryofNetPeriodicBenefitCostDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#PostretirementBenefitPlansSummaryofNetPeriodicBenefitCostDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/PostretirementBenefitPlansSummaryofNetPeriodicBenefitCostDetails" xlink:type="extended" id="icbee87ab8983444795c0c72264db0b64_PostretirementBenefitPlansSummaryofNetPeriodicBenefitCostDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217712ba-b39e-45ac-8da3-62c7b2f46090" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6f38263c-3b27-4727-8619-f498629deee4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217712ba-b39e-45ac-8da3-62c7b2f46090" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6f38263c-3b27-4727-8619-f498629deee4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_0552e5c8-fe39-4fff-ae76-28ab1559c207" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6f38263c-3b27-4727-8619-f498629deee4" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_0552e5c8-fe39-4fff-ae76-28ab1559c207" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_b70d7582-9bfe-4ac2-80fb-32bffbb4289b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_0552e5c8-fe39-4fff-ae76-28ab1559c207" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_b70d7582-9bfe-4ac2-80fb-32bffbb4289b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_37080ba2-138c-40e5-8751-fcd6a5c70bdf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_0552e5c8-fe39-4fff-ae76-28ab1559c207" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_37080ba2-138c-40e5-8751-fcd6a5c70bdf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_2a3414d8-51c5-4804-816a-8a7424f214c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_0552e5c8-fe39-4fff-ae76-28ab1559c207" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_2a3414d8-51c5-4804-816a-8a7424f214c6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_73ef90a5-ca3b-4c3c-a9f8-6fce77159050" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_0552e5c8-fe39-4fff-ae76-28ab1559c207" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_73ef90a5-ca3b-4c3c-a9f8-6fce77159050" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_5ed68983-6d6b-4c81-b0c3-4dffad32ae54" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_0552e5c8-fe39-4fff-ae76-28ab1559c207" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_5ed68983-6d6b-4c81-b0c3-4dffad32ae54" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_790bc4bd-81a0-4455-a7bb-70c3c937893f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217712ba-b39e-45ac-8da3-62c7b2f46090" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_790bc4bd-81a0-4455-a7bb-70c3c937893f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_a6a34570-0c99-4d91-b814-5933383be594" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_790bc4bd-81a0-4455-a7bb-70c3c937893f" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_a6a34570-0c99-4d91-b814-5933383be594" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_a6a34570-0c99-4d91-b814-5933383be594_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_a6a34570-0c99-4d91-b814-5933383be594" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_a6a34570-0c99-4d91-b814-5933383be594_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_96855570-3683-4e16-854c-4ed7e1c53901" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_a6a34570-0c99-4d91-b814-5933383be594" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_96855570-3683-4e16-854c-4ed7e1c53901" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticPlanMember_372796da-5a8c-4736-832b-629d2b32306b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DomesticPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_96855570-3683-4e16-854c-4ed7e1c53901" xlink:to="loc_us-gaap_DomesticPlanMember_372796da-5a8c-4736-832b-629d2b32306b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignPlanMember_ddf0dff4-de71-49cb-8127-e96f44a2680f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_96855570-3683-4e16-854c-4ed7e1c53901" xlink:to="loc_us-gaap_ForeignPlanMember_ddf0dff4-de71-49cb-8127-e96f44a2680f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/PostretirementBenefitPlansTextualsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#PostretirementBenefitPlansTextualsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/PostretirementBenefitPlansTextualsDetails" xlink:type="extended" id="ia91357fdc2b841bf92a5ae1e19fcaf52_PostretirementBenefitPlansTextualsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_65effe51-53dc-4d3d-a576-f38f0aab2703" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitExpense_9467a71a-ca97-41bd-8ec9-c9c41207f9a5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherPostretirementBenefitExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_65effe51-53dc-4d3d-a576-f38f0aab2703" xlink:to="loc_us-gaap_OtherPostretirementBenefitExpense_9467a71a-ca97-41bd-8ec9-c9c41207f9a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_46afccdc-93d4-4332-81c4-24f2a1c61fdd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_65effe51-53dc-4d3d-a576-f38f0aab2703" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_46afccdc-93d4-4332-81c4-24f2a1c61fdd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_37c00ee0-12c5-4968-9040-85232afb341f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_65effe51-53dc-4d3d-a576-f38f0aab2703" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_37c00ee0-12c5-4968-9040-85232afb341f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_5f070e08-3ceb-4d30-875f-f1ce9a7c1271" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_65effe51-53dc-4d3d-a576-f38f0aab2703" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_5f070e08-3ceb-4d30-875f-f1ce9a7c1271" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_708e68f6-c538-4456-a6ee-0dc87911ff45" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_65effe51-53dc-4d3d-a576-f38f0aab2703" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_708e68f6-c538-4456-a6ee-0dc87911ff45" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_96b21f65-9d5d-4372-9504-16d261d255db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_708e68f6-c538-4456-a6ee-0dc87911ff45" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_96b21f65-9d5d-4372-9504-16d261d255db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_96b21f65-9d5d-4372-9504-16d261d255db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_96b21f65-9d5d-4372-9504-16d261d255db" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_96b21f65-9d5d-4372-9504-16d261d255db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_5cf44572-f6d7-4bce-bf0d-c75813dac84e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_96b21f65-9d5d-4372-9504-16d261d255db" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_5cf44572-f6d7-4bce-bf0d-c75813dac84e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignPlanMember_8d60ec23-5d1c-4368-aec4-e4ecf2df49c3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5cf44572-f6d7-4bce-bf0d-c75813dac84e" xlink:to="loc_us-gaap_ForeignPlanMember_8d60ec23-5d1c-4368-aec4-e4ecf2df49c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_6efcd474-bd34-4a96-9ee0-4e6db7cd215f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_708e68f6-c538-4456-a6ee-0dc87911ff45" xlink:to="loc_srt_RangeAxis_6efcd474-bd34-4a96-9ee0-4e6db7cd215f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_6efcd474-bd34-4a96-9ee0-4e6db7cd215f_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_6efcd474-bd34-4a96-9ee0-4e6db7cd215f" xlink:to="loc_srt_RangeMember_6efcd474-bd34-4a96-9ee0-4e6db7cd215f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1c4067f2-0f61-4bb7-9ec9-2f73599a2f08" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_6efcd474-bd34-4a96-9ee0-4e6db7cd215f" xlink:to="loc_srt_RangeMember_1c4067f2-0f61-4bb7-9ec9-2f73599a2f08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_08e8e46f-bbd2-4bb6-8822-f502112209cf" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1c4067f2-0f61-4bb7-9ec9-2f73599a2f08" xlink:to="loc_srt_MinimumMember_08e8e46f-bbd2-4bb6-8822-f502112209cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d5639beb-c023-4b8f-8c98-dbba85d7594b" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1c4067f2-0f61-4bb7-9ec9-2f73599a2f08" xlink:to="loc_srt_MaximumMember_d5639beb-c023-4b8f-8c98-dbba85d7594b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/EquitySummaryofShareholdersEquityDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#EquitySummaryofShareholdersEquityDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/EquitySummaryofShareholdersEquityDetails" xlink:type="extended" id="ia997fa066f6048ea85fcb47c96b230f1_EquitySummaryofShareholdersEquityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_2a74eb3a-8215-49b0-bea4-7187ef2d8105" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_a0fc7221-1fbc-42a1-8634-42092080e627" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2a74eb3a-8215-49b0-bea4-7187ef2d8105" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_a0fc7221-1fbc-42a1-8634-42092080e627" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_92bdd29a-971c-4455-9384-188b26d68d23" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2a74eb3a-8215-49b0-bea4-7187ef2d8105" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_92bdd29a-971c-4455-9384-188b26d68d23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_1f7900fc-2bd4-4834-98ab-65559e9a394d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_92bdd29a-971c-4455-9384-188b26d68d23" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_1f7900fc-2bd4-4834-98ab-65559e9a394d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_10cb4ffe-90c6-456b-8990-1998c8f60386" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_92bdd29a-971c-4455-9384-188b26d68d23" xlink:to="loc_us-gaap_ProfitLoss_10cb4ffe-90c6-456b-8990-1998c8f60386" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_4fdebba4-a2f5-498a-a28c-baa9c38e41dd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_92bdd29a-971c-4455-9384-188b26d68d23" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_4fdebba4-a2f5-498a-a28c-baa9c38e41dd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_9ed17dc4-a964-4c3b-a9f4-8cba8c234b5b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_92bdd29a-971c-4455-9384-188b26d68d23" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_9ed17dc4-a964-4c3b-a9f4-8cba8c234b5b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_4d2472d9-e843-4da4-8029-964c35ccd1cc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_92bdd29a-971c-4455-9384-188b26d68d23" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_4d2472d9-e843-4da4-8029-964c35ccd1cc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityOther_06575a98-0989-43cb-b2c0-6805225d454b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_92bdd29a-971c-4455-9384-188b26d68d23" xlink:to="loc_us-gaap_StockholdersEquityOther_06575a98-0989-43cb-b2c0-6805225d454b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCash_6aa1086c-02a0-4940-8441-57349fc7bebe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DividendsCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_92bdd29a-971c-4455-9384-188b26d68d23" xlink:to="loc_us-gaap_DividendsCash_6aa1086c-02a0-4940-8441-57349fc7bebe" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_372e6cdf-f540-40a3-ab80-c3801c9663e4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_92bdd29a-971c-4455-9384-188b26d68d23" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_372e6cdf-f540-40a3-ab80-c3801c9663e4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_a77f062b-f59a-4cd8-9239-2beb62a9d363" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_92bdd29a-971c-4455-9384-188b26d68d23" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_a77f062b-f59a-4cd8-9239-2beb62a9d363" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_71e63fc7-b962-439d-948f-f8419f1eda2f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_b8610e2b-7826-4143-ae8e-51d1a185f2d0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_2a74eb3a-8215-49b0-bea4-7187ef2d8105" xlink:to="loc_us-gaap_StatementTable_b8610e2b-7826-4143-ae8e-51d1a185f2d0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_ea5e4a59-788b-48d5-81ce-1e565106e7be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_b8610e2b-7826-4143-ae8e-51d1a185f2d0" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_ea5e4a59-788b-48d5-81ce-1e565106e7be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_ea5e4a59-788b-48d5-81ce-1e565106e7be_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_ea5e4a59-788b-48d5-81ce-1e565106e7be" xlink:to="loc_us-gaap_EquityComponentDomain_ea5e4a59-788b-48d5-81ce-1e565106e7be_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_20ed47fa-c5b0-43e3-8512-5ef64320b813" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_ea5e4a59-788b-48d5-81ce-1e565106e7be" xlink:to="loc_us-gaap_EquityComponentDomain_20ed47fa-c5b0-43e3-8512-5ef64320b813" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_65bae55d-790e-433d-9dab-328c23214a1e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_20ed47fa-c5b0-43e3-8512-5ef64320b813" xlink:to="loc_us-gaap_CommonStockMember_65bae55d-790e-433d-9dab-328c23214a1e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_95898ba6-fd38-469e-ae92-2e279832f418" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_20ed47fa-c5b0-43e3-8512-5ef64320b813" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_95898ba6-fd38-469e-ae92-2e279832f418" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_7d56b834-e5a7-489d-8ba8-093fb2796c78" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_20ed47fa-c5b0-43e3-8512-5ef64320b813" xlink:to="loc_us-gaap_RetainedEarningsMember_7d56b834-e5a7-489d-8ba8-093fb2796c78" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_e6672eb0-ddfe-4eba-8713-28d5bc9e8a69" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_20ed47fa-c5b0-43e3-8512-5ef64320b813" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_e6672eb0-ddfe-4eba-8713-28d5bc9e8a69" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_4915ec9c-9ff7-448d-a579-97c78d92bd81" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_20ed47fa-c5b0-43e3-8512-5ef64320b813" xlink:to="loc_us-gaap_TreasuryStockCommonMember_4915ec9c-9ff7-448d-a579-97c78d92bd81" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_db577768-28ae-4127-b6cf-653a94f017db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_20ed47fa-c5b0-43e3-8512-5ef64320b813" xlink:to="loc_us-gaap_NoncontrollingInterestMember_db577768-28ae-4127-b6cf-653a94f017db" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansTextualsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#ShareBasedCompensationPlansTextualsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansTextualsDetails" xlink:type="extended" id="ifcd95fc0e415424aa6aade1549396aff_ShareBasedCompensationPlansTextualsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a4452c5-7c97-409f-97e5-30dc803358d4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_bc1cf450-2047-4b5a-8522-95d8d9ac1f47" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a4452c5-7c97-409f-97e5-30dc803358d4" xlink:to="loc_us-gaap_ShareBasedCompensation_bc1cf450-2047-4b5a-8522-95d8d9ac1f47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_b6e6a08b-1e1d-4979-9cb1-1596e57467b3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a4452c5-7c97-409f-97e5-30dc803358d4" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_b6e6a08b-1e1d-4979-9cb1-1596e57467b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_cc317a64-1703-4539-97f3-bfa9379b0315" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a4452c5-7c97-409f-97e5-30dc803358d4" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_cc317a64-1703-4539-97f3-bfa9379b0315" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_9886b9f6-4a91-4942-afb9-310ad75a74d6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a4452c5-7c97-409f-97e5-30dc803358d4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_9886b9f6-4a91-4942-afb9-310ad75a74d6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_d1cb06f0-bb52-45ca-9047-bb94e3865cf9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a4452c5-7c97-409f-97e5-30dc803358d4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_d1cb06f0-bb52-45ca-9047-bb94e3865cf9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_6ae62409-5ee9-421f-af52-8ebbb6334803" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a4452c5-7c97-409f-97e5-30dc803358d4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_6ae62409-5ee9-421f-af52-8ebbb6334803" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_6b79cb1e-c933-4910-8bd7-65f9b0894a11" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a4452c5-7c97-409f-97e5-30dc803358d4" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_6b79cb1e-c933-4910-8bd7-65f9b0894a11" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_60bf9c5e-19ca-46de-bf1f-8ba13298f220" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a4452c5-7c97-409f-97e5-30dc803358d4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_60bf9c5e-19ca-46de-bf1f-8ba13298f220" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_0c440d2b-f3aa-4ac8-9d30-355aa7fe284b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a4452c5-7c97-409f-97e5-30dc803358d4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_0c440d2b-f3aa-4ac8-9d30-355aa7fe284b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_cafcba2a-b35b-4579-a6a9-6e1dd4a029be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a4452c5-7c97-409f-97e5-30dc803358d4" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_cafcba2a-b35b-4579-a6a9-6e1dd4a029be" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_02ecddcc-2b14-43b2-9728-a4c921f01380" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_cafcba2a-b35b-4579-a6a9-6e1dd4a029be" xlink:to="loc_us-gaap_AwardTypeAxis_02ecddcc-2b14-43b2-9728-a4c921f01380" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_02ecddcc-2b14-43b2-9728-a4c921f01380_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_02ecddcc-2b14-43b2-9728-a4c921f01380" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_02ecddcc-2b14-43b2-9728-a4c921f01380_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b27659c2-27d3-4323-b956-763b2f2e3084" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_02ecddcc-2b14-43b2-9728-a4c921f01380" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b27659c2-27d3-4323-b956-763b2f2e3084" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_52f01e49-7a45-4650-88ae-934da567f825" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b27659c2-27d3-4323-b956-763b2f2e3084" xlink:to="loc_us-gaap_EmployeeStockOptionMember_52f01e49-7a45-4650-88ae-934da567f825" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_f45afdf7-4fae-4669-a33b-04293a9da9ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b27659c2-27d3-4323-b956-763b2f2e3084" xlink:to="loc_us-gaap_RestrictedStockMember_f45afdf7-4fae-4669-a33b-04293a9da9ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_d389e970-4c61-414b-bdcb-6acf9c77507c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b27659c2-27d3-4323-b956-763b2f2e3084" xlink:to="loc_us-gaap_PerformanceSharesMember_d389e970-4c61-414b-bdcb-6acf9c77507c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansStockOptionFairValueAssumptionsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#ShareBasedCompensationPlansStockOptionFairValueAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansStockOptionFairValueAssumptionsDetails" xlink:type="extended" id="i52cfbe63211f456198b9e675eeffe6b7_ShareBasedCompensationPlansStockOptionFairValueAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_43b5f9a2-20db-4a4d-b5b5-2f16ae9d328d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_594749a6-7ab1-4e78-9b8f-3154ecf039ac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_43b5f9a2-20db-4a4d-b5b5-2f16ae9d328d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_594749a6-7ab1-4e78-9b8f-3154ecf039ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_b832d054-ed63-4b8b-97e0-c586f1430f31" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_43b5f9a2-20db-4a4d-b5b5-2f16ae9d328d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_b832d054-ed63-4b8b-97e0-c586f1430f31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_86a74a9b-61fe-4ceb-a677-147e69305c87" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_43b5f9a2-20db-4a4d-b5b5-2f16ae9d328d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_86a74a9b-61fe-4ceb-a677-147e69305c87" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_ee79f6be-d60b-4320-a968-018db2e0c196" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_43b5f9a2-20db-4a4d-b5b5-2f16ae9d328d" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_ee79f6be-d60b-4320-a968-018db2e0c196" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageFairValue_86008ad7-ebbf-49c3-8775-19a4567ec818" xlink:href="xyl-20230630.xsd#xyl_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_43b5f9a2-20db-4a4d-b5b5-2f16ae9d328d" xlink:to="loc_xyl_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageFairValue_86008ad7-ebbf-49c3-8775-19a4567ec818" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_24d6a720-013c-4db7-a102-0a14a0c6830b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_43b5f9a2-20db-4a4d-b5b5-2f16ae9d328d" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_24d6a720-013c-4db7-a102-0a14a0c6830b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_514e7e79-a108-4f8a-a369-cfe80cd21e20" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_24d6a720-013c-4db7-a102-0a14a0c6830b" xlink:to="loc_us-gaap_AwardTypeAxis_514e7e79-a108-4f8a-a369-cfe80cd21e20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_514e7e79-a108-4f8a-a369-cfe80cd21e20_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_514e7e79-a108-4f8a-a369-cfe80cd21e20" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_514e7e79-a108-4f8a-a369-cfe80cd21e20_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1bbbe130-259a-413b-a641-6fa30b173c5a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_514e7e79-a108-4f8a-a369-cfe80cd21e20" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1bbbe130-259a-413b-a641-6fa30b173c5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_da38464d-5843-474b-b3ae-ffda49a6cb54" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1bbbe130-259a-413b-a641-6fa30b173c5a" xlink:to="loc_us-gaap_EmployeeStockOptionMember_da38464d-5843-474b-b3ae-ffda49a6cb54" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofRestrictedStockUnitGrantsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#ShareBasedCompensationPlansSummaryofRestrictedStockUnitGrantsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofRestrictedStockUnitGrantsDetails" xlink:type="extended" id="i5f5270a469664bf59ed59c3d4d140e63_ShareBasedCompensationPlansSummaryofRestrictedStockUnitGrantsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_34175921-5d5c-47ca-ad83-8b34a6cbabb7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_fdfa4428-04fb-481f-a5f0-5d0987ec5ba8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_34175921-5d5c-47ca-ad83-8b34a6cbabb7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_fdfa4428-04fb-481f-a5f0-5d0987ec5ba8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_04545d61-03eb-4c3f-864d-36e6c25a7f86" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_fdfa4428-04fb-481f-a5f0-5d0987ec5ba8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_04545d61-03eb-4c3f-864d-36e6c25a7f86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_82a9684d-fd7d-45f7-8656-2cf66b18b0e2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_fdfa4428-04fb-481f-a5f0-5d0987ec5ba8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_82a9684d-fd7d-45f7-8656-2cf66b18b0e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_09c8eafa-f2dc-480f-b352-f294378e750c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_fdfa4428-04fb-481f-a5f0-5d0987ec5ba8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_09c8eafa-f2dc-480f-b352-f294378e750c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_c478e8b7-c485-4403-9b13-2942cff7c423" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_fdfa4428-04fb-481f-a5f0-5d0987ec5ba8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_c478e8b7-c485-4403-9b13-2942cff7c423" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_e0a100fe-87ee-4eb6-9a03-97d432958fad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1cba325c-2280-411b-a495-fac6e769bccb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_34175921-5d5c-47ca-ad83-8b34a6cbabb7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1cba325c-2280-411b-a495-fac6e769bccb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_7b01953c-cb57-4128-bce2-48f4ee127a8f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1cba325c-2280-411b-a495-fac6e769bccb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_7b01953c-cb57-4128-bce2-48f4ee127a8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_cd003821-65d8-45bd-934c-3eca7c053e9a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1cba325c-2280-411b-a495-fac6e769bccb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_cd003821-65d8-45bd-934c-3eca7c053e9a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_440f2a0d-42ba-4179-ab59-d0a1e4f6810d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1cba325c-2280-411b-a495-fac6e769bccb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_440f2a0d-42ba-4179-ab59-d0a1e4f6810d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_df7a0e13-4609-460a-8f9d-1a5ce6b3ad5a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1cba325c-2280-411b-a495-fac6e769bccb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_df7a0e13-4609-460a-8f9d-1a5ce6b3ad5a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_c738977e-c9c9-4065-9db1-9aa2ccc0b50c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b956bef0-15e1-40bc-a1b1-59741953597c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_34175921-5d5c-47ca-ad83-8b34a6cbabb7" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b956bef0-15e1-40bc-a1b1-59741953597c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_76d4b990-ced5-43d7-b074-f22ea4eb5fca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b956bef0-15e1-40bc-a1b1-59741953597c" xlink:to="loc_us-gaap_AwardTypeAxis_76d4b990-ced5-43d7-b074-f22ea4eb5fca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_76d4b990-ced5-43d7-b074-f22ea4eb5fca_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_76d4b990-ced5-43d7-b074-f22ea4eb5fca" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_76d4b990-ced5-43d7-b074-f22ea4eb5fca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d21ce003-8482-45f3-b7e0-b3e8d859916c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_76d4b990-ced5-43d7-b074-f22ea4eb5fca" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d21ce003-8482-45f3-b7e0-b3e8d859916c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_c933f164-ed8d-4f37-a0bc-0f920f3260a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d21ce003-8482-45f3-b7e0-b3e8d859916c" xlink:to="loc_us-gaap_RestrictedStockMember_c933f164-ed8d-4f37-a0bc-0f920f3260a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_REVPerformanceSharesMember_b78f4dd1-76c0-40c4-be41-77ae9e21a9b8" xlink:href="xyl-20230630.xsd#xyl_REVPerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d21ce003-8482-45f3-b7e0-b3e8d859916c" xlink:to="loc_xyl_REVPerformanceSharesMember_b78f4dd1-76c0-40c4-be41-77ae9e21a9b8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansShareBasedCompensationPlansSummaryofROICPerformanceShareUnitGrantsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#ShareBasedCompensationPlansShareBasedCompensationPlansSummaryofROICPerformanceShareUnitGrantsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansShareBasedCompensationPlansSummaryofROICPerformanceShareUnitGrantsDetails" xlink:type="extended" id="iaaa66b6abc63401d8f7eef5dbd0be358_ShareBasedCompensationPlansShareBasedCompensationPlansSummaryofROICPerformanceShareUnitGrantsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_356f5630-9aa6-4fa9-8e10-aadba23aa940" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_58c88b2c-1e58-48c9-a738-6dc0b4cc275e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_356f5630-9aa6-4fa9-8e10-aadba23aa940" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_58c88b2c-1e58-48c9-a738-6dc0b4cc275e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_d1d37be7-6e2a-4284-8b65-4482d1663e11" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_58c88b2c-1e58-48c9-a738-6dc0b4cc275e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_d1d37be7-6e2a-4284-8b65-4482d1663e11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_13369ea9-ecb6-44da-99de-016782dabf7e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_58c88b2c-1e58-48c9-a738-6dc0b4cc275e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_13369ea9-ecb6-44da-99de-016782dabf7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod_f0dd07d7-e93e-470a-b3d7-5ce301289a12" xlink:href="xyl-20230630.xsd#xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_58c88b2c-1e58-48c9-a738-6dc0b4cc275e" xlink:to="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod_f0dd07d7-e93e-470a-b3d7-5ce301289a12" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_39be6dc7-97fa-4304-bf0a-f7ef0d6ad080" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_58c88b2c-1e58-48c9-a738-6dc0b4cc275e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_39be6dc7-97fa-4304-bf0a-f7ef0d6ad080" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_c23c74c0-9755-4610-8110-0add5e89a7fe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_58c88b2c-1e58-48c9-a738-6dc0b4cc275e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_c23c74c0-9755-4610-8110-0add5e89a7fe" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_3f9a1ca2-0d38-4641-adf5-db74013307cc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_10a3e3b5-a3ff-4928-9d94-af5ebc9a0148" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_356f5630-9aa6-4fa9-8e10-aadba23aa940" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_10a3e3b5-a3ff-4928-9d94-af5ebc9a0148" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_7672bce2-3c8e-4050-a5cb-16bf55ec9fb5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_10a3e3b5-a3ff-4928-9d94-af5ebc9a0148" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_7672bce2-3c8e-4050-a5cb-16bf55ec9fb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_371defd1-d384-4ef5-9a76-81950cfe5135" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_10a3e3b5-a3ff-4928-9d94-af5ebc9a0148" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_371defd1-d384-4ef5-9a76-81950cfe5135" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue_6363ff12-8a9e-40c6-af94-61f5546c3d00" xlink:href="xyl-20230630.xsd#xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_10a3e3b5-a3ff-4928-9d94-af5ebc9a0148" xlink:to="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue_6363ff12-8a9e-40c6-af94-61f5546c3d00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_f32dea23-f326-4330-933f-47ed03efdc25" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_10a3e3b5-a3ff-4928-9d94-af5ebc9a0148" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_f32dea23-f326-4330-933f-47ed03efdc25" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_2115e27e-cc1e-4563-88d8-94c3c37ebb45" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_10a3e3b5-a3ff-4928-9d94-af5ebc9a0148" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_2115e27e-cc1e-4563-88d8-94c3c37ebb45" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8372cd57-cc2e-43ac-bc1b-3cb53aea83d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ef6cb41d-33eb-4d12-89dd-ac5bf9d9f437" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_356f5630-9aa6-4fa9-8e10-aadba23aa940" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ef6cb41d-33eb-4d12-89dd-ac5bf9d9f437" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_827f13cd-2c87-4a38-a931-1f64a445c412" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ef6cb41d-33eb-4d12-89dd-ac5bf9d9f437" xlink:to="loc_us-gaap_PlanNameAxis_827f13cd-2c87-4a38-a931-1f64a445c412" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_827f13cd-2c87-4a38-a931-1f64a445c412_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_827f13cd-2c87-4a38-a931-1f64a445c412" xlink:to="loc_us-gaap_PlanNameDomain_827f13cd-2c87-4a38-a931-1f64a445c412_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_828b0ce9-1b2e-49c3-8251-f0356f510356" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_827f13cd-2c87-4a38-a931-1f64a445c412" xlink:to="loc_us-gaap_PlanNameDomain_828b0ce9-1b2e-49c3-8251-f0356f510356" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_ReturnonInvestedCapitalPerformanceBasedSharesMember_d48c7814-3ee1-4c4a-b477-ca7f3698efa7" xlink:href="xyl-20230630.xsd#xyl_ReturnonInvestedCapitalPerformanceBasedSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_828b0ce9-1b2e-49c3-8251-f0356f510356" xlink:to="loc_xyl_ReturnonInvestedCapitalPerformanceBasedSharesMember_d48c7814-3ee1-4c4a-b477-ca7f3698efa7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_9f2b6811-8e6e-49df-ad94-d4588d5c40f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ef6cb41d-33eb-4d12-89dd-ac5bf9d9f437" xlink:to="loc_us-gaap_AwardTypeAxis_9f2b6811-8e6e-49df-ad94-d4588d5c40f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9f2b6811-8e6e-49df-ad94-d4588d5c40f8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_9f2b6811-8e6e-49df-ad94-d4588d5c40f8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9f2b6811-8e6e-49df-ad94-d4588d5c40f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5a9c359b-7f48-434a-99e1-0af1c51c7303" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_9f2b6811-8e6e-49df-ad94-d4588d5c40f8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5a9c359b-7f48-434a-99e1-0af1c51c7303" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_27a2a88c-7cb7-4496-bc69-b7c054df7028" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5a9c359b-7f48-434a-99e1-0af1c51c7303" xlink:to="loc_us-gaap_PerformanceSharesMember_27a2a88c-7cb7-4496-bc69-b7c054df7028" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofPerformanceBasedShareGrantsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#ShareBasedCompensationPlansSummaryofPerformanceBasedShareGrantsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofPerformanceBasedShareGrantsDetails" xlink:type="extended" id="i98c19eb351b54d50823aceed510f2155_ShareBasedCompensationPlansSummaryofPerformanceBasedShareGrantsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a428e51-9484-44d3-8583-2ad6794baf42" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_572bb9ec-b1e5-4e55-8192-50bbd1d72793" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a428e51-9484-44d3-8583-2ad6794baf42" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_572bb9ec-b1e5-4e55-8192-50bbd1d72793" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_fcca2b11-5edc-40b7-b1eb-cdb61218e789" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_572bb9ec-b1e5-4e55-8192-50bbd1d72793" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_fcca2b11-5edc-40b7-b1eb-cdb61218e789" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_1919784b-082c-4186-8106-1c8e45a46a46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_572bb9ec-b1e5-4e55-8192-50bbd1d72793" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_1919784b-082c-4186-8106-1c8e45a46a46" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod_f0d57ca5-27e3-40bc-ab54-8324dbaf222f" xlink:href="xyl-20230630.xsd#xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_572bb9ec-b1e5-4e55-8192-50bbd1d72793" xlink:to="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod_f0d57ca5-27e3-40bc-ab54-8324dbaf222f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_5a0e897e-7255-4bd6-846d-d79824b99d83" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_572bb9ec-b1e5-4e55-8192-50bbd1d72793" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_5a0e897e-7255-4bd6-846d-d79824b99d83" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_4389678a-5945-49fc-a6be-273040ad487c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_572bb9ec-b1e5-4e55-8192-50bbd1d72793" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_4389678a-5945-49fc-a6be-273040ad487c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_06165492-de62-44e2-bcdb-6eb1160aa8cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_22d26903-68b2-428a-b4e9-3ec3c1fc6baa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a428e51-9484-44d3-8583-2ad6794baf42" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_22d26903-68b2-428a-b4e9-3ec3c1fc6baa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_6b645fbd-ab21-41ae-abea-19d4435ac566" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_22d26903-68b2-428a-b4e9-3ec3c1fc6baa" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_6b645fbd-ab21-41ae-abea-19d4435ac566" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_34411eaa-de1e-40f4-8ca6-8d7f3726d75d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_22d26903-68b2-428a-b4e9-3ec3c1fc6baa" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_34411eaa-de1e-40f4-8ca6-8d7f3726d75d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue_43a01364-4b5b-4aca-ad52-f6743f025c17" xlink:href="xyl-20230630.xsd#xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_22d26903-68b2-428a-b4e9-3ec3c1fc6baa" xlink:to="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue_43a01364-4b5b-4aca-ad52-f6743f025c17" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5a888162-cba4-478d-a75b-c674651ca2f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_22d26903-68b2-428a-b4e9-3ec3c1fc6baa" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5a888162-cba4-478d-a75b-c674651ca2f8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_6e16d9b7-92c7-4bc5-b7f4-ccc724943a2d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_22d26903-68b2-428a-b4e9-3ec3c1fc6baa" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_6e16d9b7-92c7-4bc5-b7f4-ccc724943a2d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b1920ae2-591f-414f-aaa2-c5e6df46336f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7389db95-24b4-48e9-906d-4b8361cd9deb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0a428e51-9484-44d3-8583-2ad6794baf42" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7389db95-24b4-48e9-906d-4b8361cd9deb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_090c1dd8-bf27-4f61-a801-23ba7e9787f5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7389db95-24b4-48e9-906d-4b8361cd9deb" xlink:to="loc_us-gaap_PlanNameAxis_090c1dd8-bf27-4f61-a801-23ba7e9787f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_090c1dd8-bf27-4f61-a801-23ba7e9787f5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_090c1dd8-bf27-4f61-a801-23ba7e9787f5" xlink:to="loc_us-gaap_PlanNameDomain_090c1dd8-bf27-4f61-a801-23ba7e9787f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_968f84ff-7a38-49cd-ac80-e50bbef90dfa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_090c1dd8-bf27-4f61-a801-23ba7e9787f5" xlink:to="loc_us-gaap_PlanNameDomain_968f84ff-7a38-49cd-ac80-e50bbef90dfa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_TotalShareholderReturnPerformanceBasedSharesMember_9f977d25-ab4f-4d49-a955-40ad4cd8dd77" xlink:href="xyl-20230630.xsd#xyl_TotalShareholderReturnPerformanceBasedSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_968f84ff-7a38-49cd-ac80-e50bbef90dfa" xlink:to="loc_xyl_TotalShareholderReturnPerformanceBasedSharesMember_9f977d25-ab4f-4d49-a955-40ad4cd8dd77" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_8819b894-6084-4567-97b9-627cebc03ef1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7389db95-24b4-48e9-906d-4b8361cd9deb" xlink:to="loc_us-gaap_AwardTypeAxis_8819b894-6084-4567-97b9-627cebc03ef1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8819b894-6084-4567-97b9-627cebc03ef1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_8819b894-6084-4567-97b9-627cebc03ef1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8819b894-6084-4567-97b9-627cebc03ef1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_36a6e340-0760-40a9-a084-0bd7e7e827df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_8819b894-6084-4567-97b9-627cebc03ef1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_36a6e340-0760-40a9-a084-0bd7e7e827df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_3a3bcb77-b89f-46b9-9035-0e7025eaa9fc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_36a6e340-0760-40a9-a084-0bd7e7e827df" xlink:to="loc_us-gaap_PerformanceSharesMember_3a3bcb77-b89f-46b9-9035-0e7025eaa9fc" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansTSRPerformanceBasedSharesFairValueAssumptionsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#ShareBasedCompensationPlansTSRPerformanceBasedSharesFairValueAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansTSRPerformanceBasedSharesFairValueAssumptionsDetails" xlink:type="extended" id="i8b5e6ad6805743bb807d151ef7980900_ShareBasedCompensationPlansTSRPerformanceBasedSharesFairValueAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7c2f5996-e95b-424f-b5f6-317227a23006" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_97d2f961-d08a-4b8d-b1c9-6e4b4040ad9e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7c2f5996-e95b-424f-b5f6-317227a23006" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_97d2f961-d08a-4b8d-b1c9-6e4b4040ad9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_064eeedc-03f9-4343-8dda-f36ab8bd1f8e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7c2f5996-e95b-424f-b5f6-317227a23006" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_064eeedc-03f9-4343-8dda-f36ab8bd1f8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_9ea70a44-eab3-4362-a09f-3b6469579985" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7c2f5996-e95b-424f-b5f6-317227a23006" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_9ea70a44-eab3-4362-a09f-3b6469579985" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_60adb274-6af1-4b7a-830a-534a9f752cac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7c2f5996-e95b-424f-b5f6-317227a23006" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_60adb274-6af1-4b7a-830a-534a9f752cac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_1161859a-5aa7-42c9-9b86-5956d9e3e9eb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7c2f5996-e95b-424f-b5f6-317227a23006" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_1161859a-5aa7-42c9-9b86-5956d9e3e9eb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_79635711-b7f3-4162-88bd-49a70fd9bda2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7c2f5996-e95b-424f-b5f6-317227a23006" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_79635711-b7f3-4162-88bd-49a70fd9bda2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_c9119258-7dd0-465c-b6cc-e72a884c7c8d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_79635711-b7f3-4162-88bd-49a70fd9bda2" xlink:to="loc_us-gaap_PlanNameAxis_c9119258-7dd0-465c-b6cc-e72a884c7c8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_c9119258-7dd0-465c-b6cc-e72a884c7c8d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_c9119258-7dd0-465c-b6cc-e72a884c7c8d" xlink:to="loc_us-gaap_PlanNameDomain_c9119258-7dd0-465c-b6cc-e72a884c7c8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_d2c1dd34-8cae-4a96-9695-e18f4b155c96" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_c9119258-7dd0-465c-b6cc-e72a884c7c8d" xlink:to="loc_us-gaap_PlanNameDomain_d2c1dd34-8cae-4a96-9695-e18f4b155c96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_TotalShareholderReturnPerformanceBasedSharesMember_726d4ad3-9556-4f8f-9366-aff54ee0a423" xlink:href="xyl-20230630.xsd#xyl_TotalShareholderReturnPerformanceBasedSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_d2c1dd34-8cae-4a96-9695-e18f4b155c96" xlink:to="loc_xyl_TotalShareholderReturnPerformanceBasedSharesMember_726d4ad3-9556-4f8f-9366-aff54ee0a423" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_0b383a1f-bef6-4392-bcca-59f5e4e54a01" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_79635711-b7f3-4162-88bd-49a70fd9bda2" xlink:to="loc_us-gaap_AwardTypeAxis_0b383a1f-bef6-4392-bcca-59f5e4e54a01" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0b383a1f-bef6-4392-bcca-59f5e4e54a01_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_0b383a1f-bef6-4392-bcca-59f5e4e54a01" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0b383a1f-bef6-4392-bcca-59f5e4e54a01_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0961aa57-6fca-4ace-9688-6f7e29b7b3ac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_0b383a1f-bef6-4392-bcca-59f5e4e54a01" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0961aa57-6fca-4ace-9688-6f7e29b7b3ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_836f788a-0255-4553-b38c-c203ea20e757" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0961aa57-6fca-4ace-9688-6f7e29b7b3ac" xlink:to="loc_us-gaap_PerformanceSharesMember_836f788a-0255-4553-b38c-c203ea20e757" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofREVPerformanceShareUnitGrantsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#ShareBasedCompensationPlansSummaryofREVPerformanceShareUnitGrantsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofREVPerformanceShareUnitGrantsDetails" xlink:type="extended" id="i248f207213d54ab1bcef3112befe251d_ShareBasedCompensationPlansSummaryofREVPerformanceShareUnitGrantsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_24e49068-e81d-48c0-aff3-7671db0ec390" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_fdfeb46e-d971-4548-bbb8-4448894d172d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_24e49068-e81d-48c0-aff3-7671db0ec390" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_fdfeb46e-d971-4548-bbb8-4448894d172d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_e75762ff-a9ce-4f85-a37b-bb1e51d1c85e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_fdfeb46e-d971-4548-bbb8-4448894d172d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_e75762ff-a9ce-4f85-a37b-bb1e51d1c85e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_6fe47088-029b-4b98-aa90-d68c2da74ae9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_fdfeb46e-d971-4548-bbb8-4448894d172d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_6fe47088-029b-4b98-aa90-d68c2da74ae9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_e6afcdf7-7ddd-46fb-9d5e-0ed206943cc8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_fdfeb46e-d971-4548-bbb8-4448894d172d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_e6afcdf7-7ddd-46fb-9d5e-0ed206943cc8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_d404d99f-fd9c-40a2-976a-8c146b6bce3b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_403c15c0-47fd-4ee0-b6f0-e9e4d28ab118" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_24e49068-e81d-48c0-aff3-7671db0ec390" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_403c15c0-47fd-4ee0-b6f0-e9e4d28ab118" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_534b57cd-1658-4055-9594-990e9ba435b0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_403c15c0-47fd-4ee0-b6f0-e9e4d28ab118" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_534b57cd-1658-4055-9594-990e9ba435b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_a89e954c-fe8a-47eb-a614-6e9d38599010" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_403c15c0-47fd-4ee0-b6f0-e9e4d28ab118" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_a89e954c-fe8a-47eb-a614-6e9d38599010" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_5ba41045-d0a3-473f-b4de-166f15a31d42" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_403c15c0-47fd-4ee0-b6f0-e9e4d28ab118" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_5ba41045-d0a3-473f-b4de-166f15a31d42" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_c1b1a5a2-ed31-4421-9689-a145cd8f82a9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_314bd50e-8c51-4bde-bee3-a4a01cd16bde" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_24e49068-e81d-48c0-aff3-7671db0ec390" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_314bd50e-8c51-4bde-bee3-a4a01cd16bde" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_626854ca-3747-4135-a873-bc3bc60e8eba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_314bd50e-8c51-4bde-bee3-a4a01cd16bde" xlink:to="loc_us-gaap_AwardTypeAxis_626854ca-3747-4135-a873-bc3bc60e8eba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_626854ca-3747-4135-a873-bc3bc60e8eba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_626854ca-3747-4135-a873-bc3bc60e8eba" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_626854ca-3747-4135-a873-bc3bc60e8eba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f3865481-3b88-44d0-befa-f664f30049b6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_626854ca-3747-4135-a873-bc3bc60e8eba" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f3865481-3b88-44d0-befa-f664f30049b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_REVPerformanceSharesMember_ae5ca861-28cc-468c-ab7d-c2fad03d9fe0" xlink:href="xyl-20230630.xsd#xyl_REVPerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f3865481-3b88-44d0-befa-f664f30049b6" xlink:to="loc_xyl_REVPerformanceSharesMember_ae5ca861-28cc-468c-ab7d-c2fad03d9fe0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/CapitalStockTextualsDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#CapitalStockTextualsDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/CapitalStockTextualsDetails" xlink:type="extended" id="i59f51f470e0e475e83130a4d018e41f0_CapitalStockTextualsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityClassOfTreasuryStockLineItems_8c1c27f9-8689-41b6-8fc1-79bef43d24e6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityClassOfTreasuryStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_aa050efa-c7c7-42d9-8960-a5e49d794a66" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_8c1c27f9-8689-41b6-8fc1-79bef43d24e6" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_aa050efa-c7c7-42d9-8960-a5e49d794a66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_28931a19-cbd9-4491-b8b2-35eac5c4c15d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_8c1c27f9-8689-41b6-8fc1-79bef43d24e6" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_28931a19-cbd9-4491-b8b2-35eac5c4c15d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_451c18e1-9bd0-45f3-99c7-b4eeceb71e86" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_8c1c27f9-8689-41b6-8fc1-79bef43d24e6" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_451c18e1-9bd0-45f3-99c7-b4eeceb71e86" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_55cb5624-2683-431f-86b0-e12bf6b7aad0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_8c1c27f9-8689-41b6-8fc1-79bef43d24e6" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_55cb5624-2683-431f-86b0-e12bf6b7aad0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfTreasuryStockTable_05525648-ce90-4294-93e3-3924eab702c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfTreasuryStockTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_8c1c27f9-8689-41b6-8fc1-79bef43d24e6" xlink:to="loc_us-gaap_ClassOfTreasuryStockTable_05525648-ce90-4294-93e3-3924eab702c1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_8e194ac2-a9d6-4353-86fa-84abf6082f46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfTreasuryStockTable_05525648-ce90-4294-93e3-3924eab702c1" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_8e194ac2-a9d6-4353-86fa-84abf6082f46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_8e194ac2-a9d6-4353-86fa-84abf6082f46_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_8e194ac2-a9d6-4353-86fa-84abf6082f46" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_8e194ac2-a9d6-4353-86fa-84abf6082f46_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_d7b0410e-9058-43e5-ba1a-ad3bcccc24d3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_8e194ac2-a9d6-4353-86fa-84abf6082f46" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_d7b0410e-9058-43e5-ba1a-ad3bcccc24d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_ShareRepurchasePlansMember_81421e97-5ba0-469f-9515-1a00247d3e67" xlink:href="xyl-20230630.xsd#xyl_ShareRepurchasePlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_d7b0410e-9058-43e5-ba1a-ad3bcccc24d3" xlink:to="loc_xyl_ShareRepurchasePlansMember_81421e97-5ba0-469f-9515-1a00247d3e67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_TwoThousandfifteenStockRepurchaseProgramMember_baf3d21d-e40c-4162-809d-3b83f931f12e" xlink:href="xyl-20230630.xsd#xyl_TwoThousandfifteenStockRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_d7b0410e-9058-43e5-ba1a-ad3bcccc24d3" xlink:to="loc_xyl_TwoThousandfifteenStockRepurchaseProgramMember_baf3d21d-e40c-4162-809d-3b83f931f12e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_SettlementofEmployeeTaxWithholdingObligationsMember_39977bc0-f948-4ce8-8cae-663f8ae0183e" xlink:href="xyl-20230630.xsd#xyl_SettlementofEmployeeTaxWithholdingObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_d7b0410e-9058-43e5-ba1a-ad3bcccc24d3" xlink:to="loc_xyl_SettlementofEmployeeTaxWithholdingObligationsMember_39977bc0-f948-4ce8-8cae-663f8ae0183e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#AccumulatedOtherComprehensiveIncomeLossDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended" id="ib59817e760de4b66ba185ab9285e41f3_AccumulatedOtherComprehensiveIncomeLossDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_ef88e692-d2b5-44e7-92ae-ab9c7bb0dadd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:href="xyl-20230630.xsd#xyl_AccumulatedOtherComprehensiveIncomeLossRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_ef88e692-d2b5-44e7-92ae-ab9c7bb0dadd" xlink:to="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_ac77e175-575e-441e-bcb5-bc44ee4e1907" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_ac77e175-575e-441e-bcb5-bc44ee4e1907" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_0313ea54-7a62-4715-95a3-cbeaba82a487" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_0313ea54-7a62-4715-95a3-cbeaba82a487" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_3eaec40a-4ebd-4a33-8419-29c4d60606f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_3eaec40a-4ebd-4a33-8419-29c4d60606f2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_fba3c836-7e4b-4167-863a-cf772164b417" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_fba3c836-7e4b-4167-863a-cf772164b417" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_d6d9aace-4f56-45c5-b4f8-a62d4aaa4170" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_d6d9aace-4f56-45c5-b4f8-a62d4aaa4170" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax_5797f41e-07b2-46cf-a0c8-8825c7f86825" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax_5797f41e-07b2-46cf-a0c8-8825c7f86825" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_OtherComprehensiveIncomeLossForeignExchangeForPensionAndNonPensionPostretirementBenefitPlansBeforeTax_9cf37ee0-f76f-4afd-b4fa-7a494b276597" xlink:href="xyl-20230630.xsd#xyl_OtherComprehensiveIncomeLossForeignExchangeForPensionAndNonPensionPostretirementBenefitPlansBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:to="loc_xyl_OtherComprehensiveIncomeLossForeignExchangeForPensionAndNonPensionPostretirementBenefitPlansBeforeTax_9cf37ee0-f76f-4afd-b4fa-7a494b276597" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_c43ddf22-192c-42ec-9791-5ae65a09427a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_c43ddf22-192c-42ec-9791-5ae65a09427a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_54a1c651-7c48-442a-8bb4-206863357537" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_54a1c651-7c48-442a-8bb4-206863357537" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax_62751f1d-5d33-4067-9751-b1a4e1591795" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax_62751f1d-5d33-4067-9751-b1a4e1591795" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentCostOfRevenueBeforeTax_62b1189d-f096-44c8-9fb0-18585428bc95" xlink:href="xyl-20230630.xsd#xyl_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentCostOfRevenueBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_08a7be19-f556-4194-a9fa-4ac3a0e81d90" xlink:to="loc_xyl_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentCostOfRevenueBeforeTax_62b1189d-f096-44c8-9fb0-18585428bc95" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_e0044724-fb6f-45b2-972b-c0dee2758a49" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_0f9fabf2-c7b1-48cf-9c2b-07351249184d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_ef88e692-d2b5-44e7-92ae-ab9c7bb0dadd" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_0f9fabf2-c7b1-48cf-9c2b-07351249184d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_288d0b71-d3c1-41f3-b2f9-bfc70ac2d265" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_0f9fabf2-c7b1-48cf-9c2b-07351249184d" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_288d0b71-d3c1-41f3-b2f9-bfc70ac2d265" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_288d0b71-d3c1-41f3-b2f9-bfc70ac2d265_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_288d0b71-d3c1-41f3-b2f9-bfc70ac2d265" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_288d0b71-d3c1-41f3-b2f9-bfc70ac2d265_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_3ee3541e-dee6-4f20-a33d-62505a47c7ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_288d0b71-d3c1-41f3-b2f9-bfc70ac2d265" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_3ee3541e-dee6-4f20-a33d-62505a47c7ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherExpenseMember_93830df1-1275-4d14-a7a2-af40838f532e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_3ee3541e-dee6-4f20-a33d-62505a47c7ad" xlink:to="loc_us-gaap_OtherExpenseMember_93830df1-1275-4d14-a7a2-af40838f532e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesMember_023d48c8-6633-41d9-b594-e74728c75330" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_3ee3541e-dee6-4f20-a33d-62505a47c7ad" xlink:to="loc_us-gaap_SalesMember_023d48c8-6633-41d9-b594-e74728c75330" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_22562ae0-1bd2-4415-bcb8-fc85d17fe850" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_3ee3541e-dee6-4f20-a33d-62505a47c7ad" xlink:to="loc_us-gaap_CostOfSalesMember_22562ae0-1bd2-4415-bcb8-fc85d17fe850" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_e25b5cd3-652a-4c44-b80d-8dd016bf83dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_0f9fabf2-c7b1-48cf-9c2b-07351249184d" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_e25b5cd3-652a-4c44-b80d-8dd016bf83dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e25b5cd3-652a-4c44-b80d-8dd016bf83dc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e25b5cd3-652a-4c44-b80d-8dd016bf83dc" xlink:to="loc_us-gaap_EquityComponentDomain_e25b5cd3-652a-4c44-b80d-8dd016bf83dc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_b8e05f3e-57e9-4219-9ce1-f8fdcb77f218" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e25b5cd3-652a-4c44-b80d-8dd016bf83dc" xlink:to="loc_us-gaap_EquityComponentDomain_b8e05f3e-57e9-4219-9ce1-f8fdcb77f218" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_34302489-6854-4e40-8a6d-85240e36dcfc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_b8e05f3e-57e9-4219-9ce1-f8fdcb77f218" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_34302489-6854-4e40-8a6d-85240e36dcfc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_b861ae49-b83b-4d17-bdb3-af306476a28d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_b8e05f3e-57e9-4219-9ce1-f8fdcb77f218" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_b861ae49-b83b-4d17-bdb3-af306476a28d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_e22702aa-5062-40c4-9276-8eb6e0e71581" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_b8e05f3e-57e9-4219-9ce1-f8fdcb77f218" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_e22702aa-5062-40c4-9276-8eb6e0e71581" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_dc4f03a3-8be0-416d-9b46-5cb569034572" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_b8e05f3e-57e9-4219-9ce1-f8fdcb77f218" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_dc4f03a3-8be0-416d-9b46-5cb569034572" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.xyleminc.com/role/SegmentInformationSummaryofOperationsbySegmentDetails" xlink:type="simple" xlink:href="xyl-20230630.xsd#SegmentInformationSummaryofOperationsbySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.xyleminc.com/role/SegmentInformationSummaryofOperationsbySegmentDetails" xlink:type="extended" id="ic7bfee58ce5f4d439482a35472740692_SegmentInformationSummaryofOperationsbySegmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_9a0a946a-36bd-463b-b564-49316aa50834" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_c1b1b326-f35e-4f4b-94b1-c77cb94b219c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9a0a946a-36bd-463b-b564-49316aa50834" xlink:to="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_c1b1b326-f35e-4f4b-94b1-c77cb94b219c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_6ece9c13-d904-4543-819f-5185f379d573" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_c1b1b326-f35e-4f4b-94b1-c77cb94b219c" xlink:to="loc_us-gaap_Revenues_6ece9c13-d904-4543-819f-5185f379d573" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_f1e6e156-0333-4730-8176-021bc0f71cc8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_c1b1b326-f35e-4f4b-94b1-c77cb94b219c" xlink:to="loc_us-gaap_OperatingIncomeLoss_f1e6e156-0333-4730-8176-021bc0f71cc8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_075e96a2-33f1-4773-90c2-74edccf653d5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_c1b1b326-f35e-4f4b-94b1-c77cb94b219c" xlink:to="loc_us-gaap_InterestExpense_075e96a2-33f1-4773-90c2-74edccf653d5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_434d6bb1-3370-41f8-befb-d2528948c306" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_c1b1b326-f35e-4f4b-94b1-c77cb94b219c" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_434d6bb1-3370-41f8-befb-d2528948c306" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_8a000571-809b-4a2f-9834-182d0e735aa7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnSaleOfBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_c1b1b326-f35e-4f4b-94b1-c77cb94b219c" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_8a000571-809b-4a2f-9834-182d0e735aa7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_23f41b23-3634-46f9-b907-b33b15295f31" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_c1b1b326-f35e-4f4b-94b1-c77cb94b219c" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_23f41b23-3634-46f9-b907-b33b15295f31" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_8fe15e4f-5323-4329-9d00-86fa5f352e69" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_c1b1b326-f35e-4f4b-94b1-c77cb94b219c" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_8fe15e4f-5323-4329-9d00-86fa5f352e69" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_8ef6429c-6c76-453f-b564-a4a3f531cdd9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_c1b1b326-f35e-4f4b-94b1-c77cb94b219c" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_8ef6429c-6c76-453f-b564-a4a3f531cdd9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_407fc322-6a60-46f9-a924-525d0e6e0503" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9a0a946a-36bd-463b-b564-49316aa50834" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_407fc322-6a60-46f9-a924-525d0e6e0503" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_078370ef-b9aa-4a84-b3dd-c605d8d61dcb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_407fc322-6a60-46f9-a924-525d0e6e0503" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_078370ef-b9aa-4a84-b3dd-c605d8d61dcb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_078370ef-b9aa-4a84-b3dd-c605d8d61dcb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_078370ef-b9aa-4a84-b3dd-c605d8d61dcb" xlink:to="loc_us-gaap_SegmentDomain_078370ef-b9aa-4a84-b3dd-c605d8d61dcb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_74e29888-1fd0-4d1e-8cee-873df4b54cae" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_078370ef-b9aa-4a84-b3dd-c605d8d61dcb" xlink:to="loc_us-gaap_SegmentDomain_74e29888-1fd0-4d1e-8cee-873df4b54cae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_abcdcbd8-0e8e-42fa-a360-b175fa44978b" xlink:href="xyl-20230630.xsd#xyl_WaterInfrastructureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_74e29888-1fd0-4d1e-8cee-873df4b54cae" xlink:to="loc_xyl_WaterInfrastructureMember_abcdcbd8-0e8e-42fa-a360-b175fa44978b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_7e7c0755-fc61-4524-8ade-179ee35f55d0" xlink:href="xyl-20230630.xsd#xyl_AppliedWaterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_74e29888-1fd0-4d1e-8cee-873df4b54cae" xlink:to="loc_xyl_AppliedWaterMember_7e7c0755-fc61-4524-8ade-179ee35f55d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_5d48cc2a-2798-48c3-b5bf-192830279437" xlink:href="xyl-20230630.xsd#xyl_MeasurementandControlSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_74e29888-1fd0-4d1e-8cee-873df4b54cae" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_5d48cc2a-2798-48c3-b5bf-192830279437" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_xyl_IntegratedSolutionsServicesMember_84157f10-1f3b-4030-bb57-e632a52bf776" xlink:href="xyl-20230630.xsd#xyl_IntegratedSolutionsServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_74e29888-1fd0-4d1e-8cee-873df4b54cae" xlink:to="loc_xyl_IntegratedSolutionsServicesMember_84157f10-1f3b-4030-bb57-e632a52bf776" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_3f61d0dd-3e23-4b7d-bfb6-330402165267" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_407fc322-6a60-46f9-a924-525d0e6e0503" xlink:to="loc_srt_ConsolidationItemsAxis_3f61d0dd-3e23-4b7d-bfb6-330402165267" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_3f61d0dd-3e23-4b7d-bfb6-330402165267_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_3f61d0dd-3e23-4b7d-bfb6-330402165267" xlink:to="loc_srt_ConsolidationItemsDomain_3f61d0dd-3e23-4b7d-bfb6-330402165267_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_8afbf182-e2d8-42a6-b62d-7e2f7c54dfb1" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_3f61d0dd-3e23-4b7d-bfb6-330402165267" xlink:to="loc_srt_ConsolidationItemsDomain_8afbf182-e2d8-42a6-b62d-7e2f7c54dfb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_5e1b63d9-e700-4e92-930b-c29868850ecb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_8afbf182-e2d8-42a6-b62d-7e2f7c54dfb1" xlink:to="loc_us-gaap_OperatingSegmentsMember_5e1b63d9-e700-4e92-930b-c29868850ecb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_64eb80bc-6b61-40ce-ab6f-bb10ba468068" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MaterialReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_8afbf182-e2d8-42a6-b62d-7e2f7c54dfb1" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_64eb80bc-6b61-40ce-ab6f-bb10ba468068" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_ab578478-c72a-466b-a9d5-5d5f07d99ad0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_8afbf182-e2d8-42a6-b62d-7e2f7c54dfb1" xlink:to="loc_us-gaap_CorporateNonSegmentMember_ab578478-c72a-466b-a9d5-5d5f07d99ad0" xlink:type="arc" order="2"/>
  </link:definitionLink>
</link:linkbase>
