SEC Info℠  
    Home      Search      My Interests      Help      Sign In      Please Sign In

Xylem Inc. – ‘10-Q’ for 3/31/20 – ‘EX-101.DEF’

On:  Tuesday, 5/5/20, at 1:28pm ET   ·   For:  3/31/20   ·   Accession #:  1524472-20-20   ·   File #:  1-35229

Previous ‘10-Q’:  ‘10-Q’ on 10/31/19 for 9/30/19   ·   Next:  ‘10-Q’ on 7/30/20 for 6/30/20   ·   Latest:  ‘10-Q’ on 5/2/24 for 3/31/24

Find Words in Filings emoji
 		  in    Show  and   ↓Hints

  As Of               Filer                 Filing    For·On·As Docs:Size

 5/05/20  Xylem Inc.                        10-Q        3/31/20   95:12M

Quarterly Report   —   Form 10-Q   —   Sect. 13 / 15(d) – SEA’34
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-Q        Quarterly Report                                    HTML   1.05M 
 2: EX-10.35    Material Contract                                   HTML    163K 
 3: EX-10.36    Material Contract                                   HTML     82K 
 4: EX-31.1     Certification -- §302 - SOA'02                      HTML     32K 
 5: EX-31.2     Certification -- §302 - SOA'02                      HTML     32K 
 6: EX-32.1     Certification -- §906 - SOA'02                      HTML     28K 
 7: EX-32.2     Certification -- §906 - SOA'02                      HTML     28K 
24: R1          Cover Page                                          HTML     84K 
71: R2          Recently Issued Accounting Pronouncements           HTML     29K 
82: R3          Condensed Consolidated Income Statements            HTML     83K 
                (Unaudited)                                                      
53: R4          Condensed Consolidated Statements of Comprehensive  HTML     74K 
                (Loss) Income (Unaudited)                                        
22: R5          Condensed Consolidated Balance Sheets (Unaudited)   HTML    118K 
69: R6          Condensed Consolidated Balance Sheets (Unaudited)   HTML     38K 
                (Parenthetical)                                                  
80: R7          Condensed Consolidated Statements of Cash Flows     HTML    109K 
                (Unaudited)                                                      
55: R8          Restructuring Charges                               HTML    136K 
20: R9          Background and Basis of Presentation                HTML     33K 
95: R10         Acquisitions and Divestitures                       HTML     29K 
65: R11         Revenue                                             HTML    122K 
31: R12         Income Taxes                                        HTML     31K 
42: R13         Earnings Per Share                                  HTML     60K 
94: R14         Inventories                                         HTML     36K 
64: R15         Goodwill and Other Intangible Assets                HTML     86K 
30: R16         Derivative Financial Instruments                    HTML     71K 
41: R17         Accrued and Other Current Liabilities               HTML     41K 
93: R18         Credit Facilities and Debt                          HTML     65K 
66: R19         Postretirement Benefit Plans                        HTML     58K 
15: R20         Equity                                              HTML    160K 
48: R21         Share-Based Compensation Plans                      HTML    104K 
77: R22         Capital Stock                                       HTML     30K 
68: R23         Accumulated Other Comprehensive Income (Loss)       HTML    111K 
13: R24         Commitments and Contingencies                       HTML     49K 
47: R25         Segment Information                                 HTML     87K 
76: R26         Background and Basis of Presentation (Policies)     HTML     34K 
67: R27         Restructuring Charges (Tables)                      HTML    137K 
16: R28         Revenue (Tables)                                    HTML    121K 
46: R29         Earnings Per Share (Tables)                         HTML     60K 
43: R30         Inventories (Tables)                                HTML     38K 
33: R31         Goodwill and Other Intangible Assets (Tables)       HTML     87K 
62: R32         Derivative Financial Instruments (Tables)           HTML     65K 
91: R33         Accrued and Other Current Liabilities (Tables)      HTML     41K 
44: R34         Credit Facilities and Debt (Tables)                 HTML     53K 
34: R35         Postretirement Benefit Plans (Tables)               HTML     55K 
63: R36         Equity (Tables)                                     HTML    161K 
92: R37         Share-Based Compensation Plans (Tables)             HTML    109K 
45: R38         Accumulated Other Comprehensive Income (Loss)       HTML    110K 
                (Tables)                                                         
32: R39         Commitments and Contingencies (Tables)              HTML     39K 
49: R40         Segment Information (Tables)                        HTML     83K 
18: R41         Background and Basis of Presentation (Details)      HTML     27K 
74: R42         Acquisitions and Divestitures (Textuals) (Details)  HTML     27K 
84: R43         Restructuring Charges (Textuals) (Details)          HTML     35K 
50: R44         Restructuring Charges (Restructuring Charges)       HTML     49K 
                (Details)                                                        
19: R45         Restructuring Charges (Accrual Rollfoward)          HTML     49K 
                (Details)                                                        
75: R46         Restructuring Charges (Estimated Restructuring      HTML     67K 
                Costs) (Details)                                                 
85: R47         Revenue - Disaggregation of Revenue (Details)       HTML     74K 
51: R48         Revenue (Details)                                   HTML     45K 
17: R49         Revenue (Narrative) (Details)                       HTML     33K 
26: R50         Income Taxes (Textuals) (Details)                   HTML     45K 
38: R51         Earnings Per Share (Calculations for EPS)           HTML     68K 
                (Details)                                                        
89: R52         Earnings Per Share (Summary of Antidilutive         HTML     35K 
                Securities) (Details)                                            
61: R53         Inventories (Details)                               HTML     37K 
25: R54         Goodwill and Other Intangible Assets (Goodwill      HTML     38K 
                Rollforward) (Details)                                           
36: R55         Goodwill and Other Intangible Assets (Summary of    HTML     59K 
                Intangible Assets) (Details)                                     
88: R56         Goodwill and Other Intangible Assets (Details       HTML     31K 
                Textual)                                                         
60: R57         Derivative Financial Instruments (Effect of         HTML     47K 
                Deriative Instruments on Income Statement and                    
                Statement of Comprehensive Income) (Details)                     
27: R58         Derivative Financial Instruments (Balance Sheet     HTML     39K 
                Location of Derivative Instruments) (Details)                    
35: R59         Derivative Financial Instruments (Details Textual)  HTML     66K 
83: R60         Accrued and Other Current Liabilities (Details)     HTML     45K 
72: R61         Credit Facilities and Debt (Summary of Debt         HTML     53K 
                Outstanding) (Details)                                           
23: R62         Credit Facilities and Debt (Textuals) (Details)     HTML    144K 
54: R63         Postretirement Benefit Plans (Summary of Net        HTML     47K 
                Periodic Benefit Cost) (Details)                                 
81: R64         Postretirement Benefit Plans (Textuals) (Details)   HTML     52K 
70: R65         Equity - Summary of Shareholders' Equity (Details)  HTML     84K 
21: R66         Share-Based Compensation Plans (Textuals)           HTML     52K 
                (Details)                                                        
52: R67         Share-Based Compensation Plans (Summary of Stock    HTML     79K 
                Options Grant) (Details)                                         
79: R68         Share-Based Compensation Plans (Stock Option Fair   HTML     40K 
                Value Assumptions) (Details)                                     
73: R69         Share-Based Compensation Plans (Summary of          HTML     51K 
                Restricted Stock Unit Grants) (Details)                          
57: R70         Share-Based Compensation Plans Share-Based          HTML     53K 
                Compensation Plans (Summary of ROIC Performance                  
                Share Unit Grants) (Details)                                     
86: R71         Share-Based Compensation Plans (Summary of          HTML     57K 
                Performance-Based Share Grants) (Details)                        
39: R72         Share-Based Compensation Plans (TSR                 HTML     39K 
                Performance-Based Shares Fair Value Assumptions)                 
                (Details)                                                        
28: R73         Capital Stock (Textuals) (Details)                  HTML     44K 
58: R74         Accumulated Other Comprehensive Income (Loss)       HTML     79K 
                (Details)                                                        
87: R75         Commitments and Contingencies (Summary of           HTML     35K 
                Warranties) (Details)                                            
40: R76         Commitments and Contingencies (Details Textual)     HTML     33K 
29: R77         Segment Information (Summary of Operations by       HTML     65K 
                Segment) (Details)                                               
56: R78         Segment Information (Textuals) (Details)            HTML     27K 
37: XML         IDEA XML File -- Filing Summary                      XML    174K 
90: XML         XBRL Instance -- xyl-20200331_htm                    XML   3.06M 
14: EXCEL       IDEA Workbook of Financial Reports                  XLSX     88K 
 9: EX-101.CAL  XBRL Calculations -- xyl-20200331_cal                XML    218K 
10: EX-101.DEF  XBRL Definitions -- xyl-20200331_def                 XML    728K 
11: EX-101.LAB  XBRL Labels -- xyl-20200331_lab                      XML   1.66M 
12: EX-101.PRE  XBRL Presentations -- xyl-20200331_pre               XML   1.06M 
 8: EX-101.SCH  XBRL Schema -- xyl-20200331                          XSD    167K 
59: JSON        XBRL Instance as JSON Data -- MetaLinks              365±   554K 
78: ZIP         XBRL Zipped Folder -- 0001524472-20-000020-xbrl      Zip    364K

‘EX-101.DEF’   —   XBRL Definitions — xyl-20200331_def

This Exhibit is an XBRL XML File.

                                                                                                                                                                                
<?xml version="1.0" encoding="windows-1252"?>
<!-- XBRL Document Created with Wdesk from Workiva -->
<!-- Copyright 2020 Workiva -->
<!-- r:ecd1f41b-f8a1-43f1-a15a-f50660a014c3,g:ddab5745-4b28-42e5-8ae0-ea0546b31ab8 -->
<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/CoverPage" xlink:type="simple" xlink:href="xyl-20200331.xsd#CoverPage"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CoverPage" xlink:type="extended" id="ia64f310821dd442bb5220d443f5cd560_CoverPage">
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentInformationLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_c3aceff6-a057-4282-bec4-beecfdcdb5c2" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_DocumentType_c3aceff6-a057-4282-bec4-beecfdcdb5c2" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_43be2feb-1628-4f05-b1bc-8bbe412d7775" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentQuarterlyReport"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_DocumentQuarterlyReport_43be2feb-1628-4f05-b1bc-8bbe412d7775" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_e01422f7-4592-48c1-8cdd-5202557fd1f2" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_DocumentPeriodEndDate_e01422f7-4592-48c1-8cdd-5202557fd1f2" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_9c23beb0-8244-4a89-81be-cbdebf25c59a" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentTransitionReport"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_DocumentTransitionReport_9c23beb0-8244-4a89-81be-cbdebf25c59a" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_91bb44be-4a69-4fee-94d7-0b802cc436c0" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityFileNumber_91bb44be-4a69-4fee-94d7-0b802cc436c0" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_d992271d-9cd9-4e16-8bad-99bd7451fe17" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityRegistrantName_d992271d-9cd9-4e16-8bad-99bd7451fe17" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_f03b82b4-32f8-43c2-99cd-455c3d5bfeaa" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityIncorporationStateCountryCode_f03b82b4-32f8-43c2-99cd-455c3d5bfeaa" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_696b5c9d-c821-4bcd-a1c7-0d6f1cf43da8" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityTaxIdentificationNumber_696b5c9d-c821-4bcd-a1c7-0d6f1cf43da8" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_58b6418c-3451-43b5-a68b-231cc5bbc5f2" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityAddressAddressLine1_58b6418c-3451-43b5-a68b-231cc5bbc5f2" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_18c11dcb-5c66-4bf0-ae43-6b855c62c923" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityAddressCityOrTown_18c11dcb-5c66-4bf0-ae43-6b855c62c923" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_26ab2149-7346-42d5-b7ea-6eb73d39f807" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityAddressStateOrProvince_26ab2149-7346-42d5-b7ea-6eb73d39f807" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_79fbbb99-2a25-4cbb-813e-13437ec70766" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityAddressPostalZipCode_79fbbb99-2a25-4cbb-813e-13437ec70766" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_1ad4a7fd-d341-4545-a3d0-70d89d53289e" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_CityAreaCode_1ad4a7fd-d341-4545-a3d0-70d89d53289e" xlink:type="arc" order="12"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_d585629d-4bfd-4754-8a79-6746cf582eea" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_LocalPhoneNumber_d585629d-4bfd-4754-8a79-6746cf582eea" xlink:type="arc" order="13"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_00150a56-e3f6-4fed-917a-2bcb2b3f9f28" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_Security12bTitle_00150a56-e3f6-4fed-917a-2bcb2b3f9f28" xlink:type="arc" order="14"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_de42c1b2-5a02-4103-a2fb-e4b51cf53520" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_TradingSymbol_de42c1b2-5a02-4103-a2fb-e4b51cf53520" xlink:type="arc" order="15"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_651281a6-a89d-4c9b-9723-7bf85458ee96" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_SecurityExchangeName_651281a6-a89d-4c9b-9723-7bf85458ee96" xlink:type="arc" order="16"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_0a89778e-ecda-42f2-a480-43a7f6386d29" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCurrentReportingStatus"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityCurrentReportingStatus_0a89778e-ecda-42f2-a480-43a7f6386d29" xlink:type="arc" order="17"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_ba2ad26b-e51b-4f97-8541-ed3b73d934ee" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityInteractiveDataCurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityInteractiveDataCurrent_ba2ad26b-e51b-4f97-8541-ed3b73d934ee" xlink:type="arc" order="18"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_5d4de36a-871f-44b7-9aea-cec546a9b17a" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFilerCategory"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityFilerCategory_5d4de36a-871f-44b7-9aea-cec546a9b17a" xlink:type="arc" order="19"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_f43f0d09-fb5b-495b-99d6-c72f37613a0f" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntitySmallBusiness"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntitySmallBusiness_f43f0d09-fb5b-495b-99d6-c72f37613a0f" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_f4c85e6a-13c9-4447-a241-e0b29a6f2d45" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityEmergingGrowthCompany_f4c85e6a-13c9-4447-a241-e0b29a6f2d45" xlink:type="arc" order="21"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_03cb6163-f041-4ee1-96cf-d45740ba6941" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCommonStockSharesOutstanding"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_03cb6163-f041-4ee1-96cf-d45740ba6941" xlink:type="arc" order="22"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_c0f695fc-3b74-4e7f-8d48-4505d8890e7c" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityShellCompany"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityShellCompany_c0f695fc-3b74-4e7f-8d48-4505d8890e7c" xlink:type="arc" order="23"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_be24d79c-9e75-42fa-a9c9-130a62ad3e50" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_EntityCentralIndexKey_be24d79c-9e75-42fa-a9c9-130a62ad3e50" xlink:type="arc" order="24"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_91533be5-98c4-4139-adec-bf814160f8e5" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_AmendmentFlag_91533be5-98c4-4139-adec-bf814160f8e5" xlink:type="arc" order="25"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_56e97e0e-51e5-41fb-9801-abaceeed77b5" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalYearFocus"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_DocumentFiscalYearFocus_56e97e0e-51e5-41fb-9801-abaceeed77b5" xlink:type="arc" order="26"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_97a69723-341d-41d7-9d6a-9b9f3887b0fb" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalPeriodFocus"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_DocumentFiscalPeriodFocus_97a69723-341d-41d7-9d6a-9b9f3887b0fb" xlink:type="arc" order="27"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_f8558ff7-15d8-40aa-bc78-985774711f62" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CurrentFiscalYearEndDate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_CurrentFiscalYearEndDate_f8558ff7-15d8-40aa-bc78-985774711f62" xlink:type="arc" order="28"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_6e3a6066-52a1-4435-8cb3-eb4fdc88366a" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentInformationTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_05fa1dc5-8ce1-4a89-9959-0597cf686f54" xlink:to="loc_dei_DocumentInformationTable_6e3a6066-52a1-4435-8cb3-eb4fdc88366a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_9fff2379-f510-4688-88fa-0ebfe2065068" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_6e3a6066-52a1-4435-8cb3-eb4fdc88366a" xlink:to="loc_us-gaap_StatementClassOfStockAxis_9fff2379-f510-4688-88fa-0ebfe2065068" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_9fff2379-f510-4688-88fa-0ebfe2065068_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_9fff2379-f510-4688-88fa-0ebfe2065068" xlink:to="loc_us-gaap_ClassOfStockDomain_9fff2379-f510-4688-88fa-0ebfe2065068_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_8a4063af-d838-413c-b4cc-4a3a71223480" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_9fff2379-f510-4688-88fa-0ebfe2065068" xlink:to="loc_us-gaap_ClassOfStockDomain_8a4063af-d838-413c-b4cc-4a3a71223480" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_4bc1386a-595e-49e8-a26e-4e9a2147453b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_8a4063af-d838-413c-b4cc-4a3a71223480" xlink:to="loc_us-gaap_CommonStockMember_4bc1386a-595e-49e8-a26e-4e9a2147453b" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_b230bb1c-0298-45ab-8077-453b72dddc54" xlink:href="xyl-20200331.xsd#xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_8a4063af-d838-413c-b4cc-4a3a71223480" xlink:to="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_b230bb1c-0298-45ab-8077-453b72dddc54" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/CondensedConsolidatedIncomeStatementsUnaudited" xlink:type="simple" xlink:href="xyl-20200331.xsd#CondensedConsolidatedIncomeStatementsUnaudited"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CondensedConsolidatedIncomeStatementsUnaudited" xlink:type="extended" id="i93f8270e0ef7444ab5d2a0f9889033cd_CondensedConsolidatedIncomeStatementsUnaudited"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/CondensedConsolidatedStatementsofComprehensiveLossIncomeUnaudited" xlink:type="simple" xlink:href="xyl-20200331.xsd#CondensedConsolidatedStatementsofComprehensiveLossIncomeUnaudited"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CondensedConsolidatedStatementsofComprehensiveLossIncomeUnaudited" xlink:type="extended" id="ib6813b2a16824adb9cf47c9c74f965ae_CondensedConsolidatedStatementsofComprehensiveLossIncomeUnaudited"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="xyl-20200331.xsd#CondensedConsolidatedBalanceSheetsUnaudited"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="extended" id="iacc5f137f42d4e7db6144db4bad2db43_CondensedConsolidatedBalanceSheetsUnaudited"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="simple" xlink:href="xyl-20200331.xsd#CondensedConsolidatedBalanceSheetsUnauditedParenthetical"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="extended" id="ib00c85e26646481ea6e414842f98300f_CondensedConsolidatedBalanceSheetsUnauditedParenthetical"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="simple" xlink:href="xyl-20200331.xsd#CondensedConsolidatedStatementsofCashFlowsUnaudited"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="extended" id="i779958847711427a81be0491d7116366_CondensedConsolidatedStatementsofCashFlowsUnaudited"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/BackgroundandBasisofPresentation" xlink:type="simple" xlink:href="xyl-20200331.xsd#BackgroundandBasisofPresentation"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/BackgroundandBasisofPresentation" xlink:type="extended" id="i4c0ad3c345cb4362aa7c13dae391763e_BackgroundandBasisofPresentation"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/BackgroundandBasisofPresentationPolicies" xlink:type="simple" xlink:href="xyl-20200331.xsd#BackgroundandBasisofPresentationPolicies"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/BackgroundandBasisofPresentationPolicies" xlink:type="extended" id="i0d8c037bab2d48f99ecce0d506d320f1_BackgroundandBasisofPresentationPolicies"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/BackgroundandBasisofPresentationDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#BackgroundandBasisofPresentationDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/BackgroundandBasisofPresentationDetails" xlink:type="extended" id="i90307ce9c055446da4a2d3772934dce7_BackgroundandBasisofPresentationDetails"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/RecentlyIssuedAccountingPronouncements" xlink:type="simple" xlink:href="xyl-20200331.xsd#RecentlyIssuedAccountingPronouncements"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RecentlyIssuedAccountingPronouncements" xlink:type="extended" id="i64cea15aea154bbebdf271e86b133101_RecentlyIssuedAccountingPronouncements"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/AcquisitionsandDivestitures" xlink:type="simple" xlink:href="xyl-20200331.xsd#AcquisitionsandDivestitures"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/AcquisitionsandDivestitures" xlink:type="extended" id="i0c74e0ef99ad453eaad9cba6119c5318_AcquisitionsandDivestitures"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/AcquisitionsandDivestituresTextualsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#AcquisitionsandDivestituresTextualsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/AcquisitionsandDivestituresTextualsDetails" xlink:type="extended" id="ia67dd6dec200486f861b88398719f4f5_AcquisitionsandDivestituresTextualsDetails"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/RestructuringCharges" xlink:type="simple" xlink:href="xyl-20200331.xsd#RestructuringCharges"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RestructuringCharges" xlink:type="extended" id="ib382ff561a034d9baf1b79f67b0f303a_RestructuringCharges"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/RestructuringChargesTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#RestructuringChargesTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RestructuringChargesTables" xlink:type="extended" id="i5ba181b5cef24f3caaf842137ff51fa1_RestructuringChargesTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/RestructuringChargesTextualsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#RestructuringChargesTextualsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RestructuringChargesTextualsDetails" xlink:type="extended" id="id3e35580115a43b2a0ef711653a0b84c_RestructuringChargesTextualsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_8406b9b9-0fef-43b2-a1ad-86d0d794d353" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_9d037df7-e436-4d98-8c5f-ac596d747602" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCharges"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_8406b9b9-0fef-43b2-a1ad-86d0d794d353" xlink:to="loc_us-gaap_RestructuringCharges_9d037df7-e436-4d98-8c5f-ac596d747602" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_545bb5ac-8ce4-4d3c-9bc0-cc9d4aca9d41" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetImpairmentCharges"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_8406b9b9-0fef-43b2-a1ad-86d0d794d353" xlink:to="loc_us-gaap_AssetImpairmentCharges_545bb5ac-8ce4-4d3c-9bc0-cc9d4aca9d41" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_07b10bd7-30ad-40e5-a8c5-0a4475de13cb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_8406b9b9-0fef-43b2-a1ad-86d0d794d353" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_07b10bd7-30ad-40e5-a8c5-0a4475de13cb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_be869e7c-5ed8-4837-81f7-49f9dbd2d79d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_07b10bd7-30ad-40e5-a8c5-0a4475de13cb" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_be869e7c-5ed8-4837-81f7-49f9dbd2d79d" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_be869e7c-5ed8-4837-81f7-49f9dbd2d79d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_be869e7c-5ed8-4837-81f7-49f9dbd2d79d" xlink:to="loc_us-gaap_SegmentDomain_be869e7c-5ed8-4837-81f7-49f9dbd2d79d_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_83d985ed-1a9e-4fc0-9872-134b1f00b4b6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_be869e7c-5ed8-4837-81f7-49f9dbd2d79d" xlink:to="loc_us-gaap_SegmentDomain_83d985ed-1a9e-4fc0-9872-134b1f00b4b6" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_2081e412-6973-4c97-8d85-6bc59ba0d06c" xlink:href="xyl-20200331.xsd#xyl_MeasurementandControlSolutionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_83d985ed-1a9e-4fc0-9872-134b1f00b4b6" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_2081e412-6973-4c97-8d85-6bc59ba0d06c" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/RestructuringChargesRestructuringChargesDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#RestructuringChargesRestructuringChargesDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RestructuringChargesRestructuringChargesDetails" xlink:type="extended" id="if535804b1d344ba7b4c144bebfcafb2f_RestructuringChargesRestructuringChargesDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_e365ff64-7deb-424a-b4d6-0c90f9627c1e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeveranceCosts1_06cb2f0b-d47b-4b89-8ab8-63a12a815740" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeveranceCosts1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e365ff64-7deb-424a-b4d6-0c90f9627c1e" xlink:to="loc_us-gaap_SeveranceCosts1_06cb2f0b-d47b-4b89-8ab8-63a12a815740" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessExitCosts1_181a4204-de54-46c7-a9b4-c8fa9d2da3f9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessExitCosts1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e365ff64-7deb-424a-b4d6-0c90f9627c1e" xlink:to="loc_us-gaap_BusinessExitCosts1_181a4204-de54-46c7-a9b4-c8fa9d2da3f9" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_38b01c05-2c7a-4e11-93b1-a877e5c17f56" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCharges"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e365ff64-7deb-424a-b4d6-0c90f9627c1e" xlink:to="loc_us-gaap_RestructuringCharges_38b01c05-2c7a-4e11-93b1-a877e5c17f56" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_83ff512e-cf6d-4c37-8a81-d5846610e871" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetImpairmentCharges"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e365ff64-7deb-424a-b4d6-0c90f9627c1e" xlink:to="loc_us-gaap_AssetImpairmentCharges_83ff512e-cf6d-4c37-8a81-d5846610e871" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_AssetImpairmentandRestructuringCharges_e9677cb0-2561-4133-b25f-e8545a58e88e" xlink:href="xyl-20200331.xsd#xyl_AssetImpairmentandRestructuringCharges"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e365ff64-7deb-424a-b4d6-0c90f9627c1e" xlink:to="loc_xyl_AssetImpairmentandRestructuringCharges_e9677cb0-2561-4133-b25f-e8545a58e88e" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_ba8ae73c-49fe-4e4c-a7cf-b8f0604c511a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e365ff64-7deb-424a-b4d6-0c90f9627c1e" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_ba8ae73c-49fe-4e4c-a7cf-b8f0604c511a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_76beffd3-66c8-42d3-8bc6-95f78b2f9437" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_ba8ae73c-49fe-4e4c-a7cf-b8f0604c511a" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_76beffd3-66c8-42d3-8bc6-95f78b2f9437" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_76beffd3-66c8-42d3-8bc6-95f78b2f9437_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_76beffd3-66c8-42d3-8bc6-95f78b2f9437" xlink:to="loc_us-gaap_SegmentDomain_76beffd3-66c8-42d3-8bc6-95f78b2f9437_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_2f944901-4fc2-444f-882f-6de0282dce07" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_76beffd3-66c8-42d3-8bc6-95f78b2f9437" xlink:to="loc_us-gaap_SegmentDomain_2f944901-4fc2-444f-882f-6de0282dce07" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_6c35507a-c390-4c29-b0bb-37456343c6c8" xlink:href="xyl-20200331.xsd#xyl_WaterInfrastructureMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2f944901-4fc2-444f-882f-6de0282dce07" xlink:to="loc_xyl_WaterInfrastructureMember_6c35507a-c390-4c29-b0bb-37456343c6c8" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_613b00af-ddfa-4760-989c-5233a0b68360" xlink:href="xyl-20200331.xsd#xyl_AppliedWaterMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2f944901-4fc2-444f-882f-6de0282dce07" xlink:to="loc_xyl_AppliedWaterMember_613b00af-ddfa-4760-989c-5233a0b68360" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_854ac4b9-a516-499e-a643-689dd601cd94" xlink:href="xyl-20200331.xsd#xyl_MeasurementandControlSolutionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2f944901-4fc2-444f-882f-6de0282dce07" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_854ac4b9-a516-499e-a643-689dd601cd94" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/RestructuringChargesAccrualRollfowardDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#RestructuringChargesAccrualRollfowardDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RestructuringChargesAccrualRollfowardDetails" xlink:type="extended" id="ifee5aac11cd74a66a686e53afea7a002_RestructuringChargesAccrualRollfowardDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_33fd700f-7bfa-4471-9a8b-18d679dfc359" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_bafe2a7a-f904-4945-b314-a1594a4161ee" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringReserveRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_33fd700f-7bfa-4471-9a8b-18d679dfc359" xlink:to="loc_us-gaap_RestructuringReserveRollForward_bafe2a7a-f904-4945-b314-a1594a4161ee" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_224cbe1c-e5ef-4f81-be80-abb48ee79df7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringReserve"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_bafe2a7a-f904-4945-b314-a1594a4161ee" xlink:to="loc_us-gaap_RestructuringReserve_224cbe1c-e5ef-4f81-be80-abb48ee79df7" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_e817ea24-6fd2-42b3-8ba2-a4d9b635fbbe" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCharges"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_bafe2a7a-f904-4945-b314-a1594a4161ee" xlink:to="loc_us-gaap_RestructuringCharges_e817ea24-6fd2-42b3-8ba2-a4d9b635fbbe" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_614b763e-4a1e-4cee-ab8c-4de476a75c78" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForRestructuring"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_bafe2a7a-f904-4945-b314-a1594a4161ee" xlink:to="loc_us-gaap_PaymentsForRestructuring_614b763e-4a1e-4cee-ab8c-4de476a75c78" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveTranslationAndOtherAdjustment_94107870-cdca-45be-9840-a312673fe00d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringReserveTranslationAndOtherAdjustment"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_bafe2a7a-f904-4945-b314-a1594a4161ee" xlink:to="loc_us-gaap_RestructuringReserveTranslationAndOtherAdjustment_94107870-cdca-45be-9840-a312673fe00d" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_77ba6cce-7fbb-4892-bfad-82e19f11bf08" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringReserve"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_09c9b7ea-778a-4c7d-bf0a-cc1f2a2e3700" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_33fd700f-7bfa-4471-9a8b-18d679dfc359" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_09c9b7ea-778a-4c7d-bf0a-cc1f2a2e3700" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_df97864c-779a-42d1-b421-eb6ca5c77d6e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_09c9b7ea-778a-4c7d-bf0a-cc1f2a2e3700" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_df97864c-779a-42d1-b421-eb6ca5c77d6e" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_df97864c-779a-42d1-b421-eb6ca5c77d6e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_df97864c-779a-42d1-b421-eb6ca5c77d6e" xlink:to="loc_us-gaap_SegmentDomain_df97864c-779a-42d1-b421-eb6ca5c77d6e_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_49dca7c2-fe1a-45ab-aadf-5ccd8ad9eec0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_df97864c-779a-42d1-b421-eb6ca5c77d6e" xlink:to="loc_us-gaap_SegmentDomain_49dca7c2-fe1a-45ab-aadf-5ccd8ad9eec0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_7e76f614-b0da-455e-8889-becb49e0983e" xlink:href="xyl-20200331.xsd#xyl_WaterInfrastructureMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_49dca7c2-fe1a-45ab-aadf-5ccd8ad9eec0" xlink:to="loc_xyl_WaterInfrastructureMember_7e76f614-b0da-455e-8889-becb49e0983e" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_226c35e4-11c6-4bbb-b131-028a6355d651" xlink:href="xyl-20200331.xsd#xyl_AppliedWaterMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_49dca7c2-fe1a-45ab-aadf-5ccd8ad9eec0" xlink:to="loc_xyl_AppliedWaterMember_226c35e4-11c6-4bbb-b131-028a6355d651" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_602fd09e-99bb-4ede-9fe1-57a4c80162a8" xlink:href="xyl-20200331.xsd#xyl_MeasurementandControlSolutionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_49dca7c2-fe1a-45ab-aadf-5ccd8ad9eec0" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_602fd09e-99bb-4ede-9fe1-57a4c80162a8" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_RegionalSellingLocationMemberMember_963654f2-73ca-4114-819c-5d89fc84fb28" xlink:href="xyl-20200331.xsd#xyl_RegionalSellingLocationMemberMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_49dca7c2-fe1a-45ab-aadf-5ccd8ad9eec0" xlink:to="loc_xyl_RegionalSellingLocationMemberMember_963654f2-73ca-4114-819c-5d89fc84fb28" xlink:type="arc" order="3"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/RestructuringChargesEstimatedRestructuringCostsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#RestructuringChargesEstimatedRestructuringCostsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RestructuringChargesEstimatedRestructuringCostsDetails" xlink:type="extended" id="i94be613b5bd44f63a8f1657b228d15a7_RestructuringChargesEstimatedRestructuringCostsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_02e507ee-0f3a-45e5-abb4-9c68beea9323" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCost1_07302838-fb39-4264-aee7-4ff7bc653988" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringAndRelatedCostExpectedCost1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_02e507ee-0f3a-45e5-abb4-9c68beea9323" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCost1_07302838-fb39-4264-aee7-4ff7bc653988" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_2a5f0144-14b9-41f5-9750-7af26fb5b04a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringAndRelatedCostIncurredCost"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_02e507ee-0f3a-45e5-abb4-9c68beea9323" xlink:to="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_2a5f0144-14b9-41f5-9750-7af26fb5b04a" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_8052eba3-0fe4-4a26-9984-455270fd6bba" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_02e507ee-0f3a-45e5-abb4-9c68beea9323" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_8052eba3-0fe4-4a26-9984-455270fd6bba" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_22f54789-ad59-462d-9ce8-64b1c026d1ac" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_02e507ee-0f3a-45e5-abb4-9c68beea9323" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_22f54789-ad59-462d-9ce8-64b1c026d1ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_2eb0e6fa-87b3-4e6d-8fc6-9242bc803d18" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_22f54789-ad59-462d-9ce8-64b1c026d1ac" xlink:to="loc_srt_ConsolidationItemsAxis_2eb0e6fa-87b3-4e6d-8fc6-9242bc803d18" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_2eb0e6fa-87b3-4e6d-8fc6-9242bc803d18_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_2eb0e6fa-87b3-4e6d-8fc6-9242bc803d18" xlink:to="loc_srt_ConsolidationItemsDomain_2eb0e6fa-87b3-4e6d-8fc6-9242bc803d18_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_f289db1d-e794-49cf-add6-5b6a697cb579" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_2eb0e6fa-87b3-4e6d-8fc6-9242bc803d18" xlink:to="loc_srt_ConsolidationItemsDomain_f289db1d-e794-49cf-add6-5b6a697cb579" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_dd99f686-915b-46e8-9e9b-7c45fd10e0b7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_f289db1d-e794-49cf-add6-5b6a697cb579" xlink:to="loc_us-gaap_OperatingSegmentsMember_dd99f686-915b-46e8-9e9b-7c45fd10e0b7" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_a5a80d6f-0493-4c0c-957c-b77a223d6b23" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_22f54789-ad59-462d-9ce8-64b1c026d1ac" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_a5a80d6f-0493-4c0c-957c-b77a223d6b23" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a5a80d6f-0493-4c0c-957c-b77a223d6b23_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_a5a80d6f-0493-4c0c-957c-b77a223d6b23" xlink:to="loc_us-gaap_SegmentDomain_a5a80d6f-0493-4c0c-957c-b77a223d6b23_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_0f2b1134-e978-4177-b0fd-c93687a70a03" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_a5a80d6f-0493-4c0c-957c-b77a223d6b23" xlink:to="loc_us-gaap_SegmentDomain_0f2b1134-e978-4177-b0fd-c93687a70a03" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_bffe701b-3e08-46f1-87ab-b15096fa1fb9" xlink:href="xyl-20200331.xsd#xyl_WaterInfrastructureMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0f2b1134-e978-4177-b0fd-c93687a70a03" xlink:to="loc_xyl_WaterInfrastructureMember_bffe701b-3e08-46f1-87ab-b15096fa1fb9" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_2ccad824-51f7-4db0-913d-330fb6fecdfc" xlink:href="xyl-20200331.xsd#xyl_AppliedWaterMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0f2b1134-e978-4177-b0fd-c93687a70a03" xlink:to="loc_xyl_AppliedWaterMember_2ccad824-51f7-4db0-913d-330fb6fecdfc" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_7dcb288a-1670-4cf4-be01-bac375c5cf97" xlink:href="xyl-20200331.xsd#xyl_MeasurementandControlSolutionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0f2b1134-e978-4177-b0fd-c93687a70a03" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_7dcb288a-1670-4cf4-be01-bac375c5cf97" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_edef3bd5-0aa8-4a91-ba0d-a8360e733efb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringPlanAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_22f54789-ad59-462d-9ce8-64b1c026d1ac" xlink:to="loc_us-gaap_RestructuringPlanAxis_edef3bd5-0aa8-4a91-ba0d-a8360e733efb" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_edef3bd5-0aa8-4a91-ba0d-a8360e733efb_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_edef3bd5-0aa8-4a91-ba0d-a8360e733efb" xlink:to="loc_us-gaap_RestructuringPlanDomain_edef3bd5-0aa8-4a91-ba0d-a8360e733efb_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_028d854e-566a-49bf-ad9d-98cd77bed98a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_edef3bd5-0aa8-4a91-ba0d-a8360e733efb" xlink:to="loc_us-gaap_RestructuringPlanDomain_028d854e-566a-49bf-ad9d-98cd77bed98a" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_TwoThousandTwentyRestructuringPlanMember_b55c9111-6720-4081-9b82-2026d438e3cd" xlink:href="xyl-20200331.xsd#xyl_TwoThousandTwentyRestructuringPlanMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_028d854e-566a-49bf-ad9d-98cd77bed98a" xlink:to="loc_xyl_TwoThousandTwentyRestructuringPlanMember_b55c9111-6720-4081-9b82-2026d438e3cd" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_TwoThousandNineteenRestructuringPlanMember_90bc1200-261b-42af-bfc7-5d74a1980085" xlink:href="xyl-20200331.xsd#xyl_TwoThousandNineteenRestructuringPlanMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_028d854e-566a-49bf-ad9d-98cd77bed98a" xlink:to="loc_xyl_TwoThousandNineteenRestructuringPlanMember_90bc1200-261b-42af-bfc7-5d74a1980085" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_TwoThousandSeventeenRestructuringPlanMember_f99a3546-f69a-4c8f-a605-438d84487f2e" xlink:href="xyl-20200331.xsd#xyl_TwoThousandSeventeenRestructuringPlanMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_028d854e-566a-49bf-ad9d-98cd77bed98a" xlink:to="loc_xyl_TwoThousandSeventeenRestructuringPlanMember_f99a3546-f69a-4c8f-a605-438d84487f2e" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/Revenue" xlink:type="simple" xlink:href="xyl-20200331.xsd#Revenue"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/Revenue" xlink:type="extended" id="ife48b3580a4e4c9980cf790dd7abc806_Revenue"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/RevenueTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#RevenueTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RevenueTables" xlink:type="extended" id="i1a911765b01a4b26873b374bc110f727_RevenueTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/RevenueDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#RevenueDisaggregationofRevenueDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RevenueDisaggregationofRevenueDetails" xlink:type="extended" id="iea2dc51eaa0c4769ba25c12d99809cd3_RevenueDisaggregationofRevenueDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_d31be2a9-7daa-4f3c-b8cd-10a52cdbd4cd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_0b648fb5-96bb-4731-94ba-d10b89d3942f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_d31be2a9-7daa-4f3c-b8cd-10a52cdbd4cd" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_0b648fb5-96bb-4731-94ba-d10b89d3942f" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_OtherRevenues_1793f056-c8eb-4958-8cca-d1a870f1f497" xlink:href="xyl-20200331.xsd#xyl_OtherRevenues"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_d31be2a9-7daa-4f3c-b8cd-10a52cdbd4cd" xlink:to="loc_xyl_OtherRevenues_1793f056-c8eb-4958-8cca-d1a870f1f497" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_ec3d4374-d56e-4824-b630-1d2dba750a58" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Revenues"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_d31be2a9-7daa-4f3c-b8cd-10a52cdbd4cd" xlink:to="loc_us-gaap_Revenues_ec3d4374-d56e-4824-b630-1d2dba750a58" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_c7ae9eda-924b-4fc4-8e2b-06bd50333bca" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_d31be2a9-7daa-4f3c-b8cd-10a52cdbd4cd" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_c7ae9eda-924b-4fc4-8e2b-06bd50333bca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_eaa59272-41cf-443d-9937-3e12c632672a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_c7ae9eda-924b-4fc4-8e2b-06bd50333bca" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_eaa59272-41cf-443d-9937-3e12c632672a" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_eaa59272-41cf-443d-9937-3e12c632672a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_eaa59272-41cf-443d-9937-3e12c632672a" xlink:to="loc_us-gaap_SegmentDomain_eaa59272-41cf-443d-9937-3e12c632672a_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c1d3adcc-f0a6-4740-b2fe-60b1e27ba84b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_eaa59272-41cf-443d-9937-3e12c632672a" xlink:to="loc_us-gaap_SegmentDomain_c1d3adcc-f0a6-4740-b2fe-60b1e27ba84b" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_8eb3a169-47d4-4db1-ad6c-bf7e334b2d8c" xlink:href="xyl-20200331.xsd#xyl_WaterInfrastructureMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c1d3adcc-f0a6-4740-b2fe-60b1e27ba84b" xlink:to="loc_xyl_WaterInfrastructureMember_8eb3a169-47d4-4db1-ad6c-bf7e334b2d8c" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_dca1e0f2-adb7-41f7-a729-3758ceee4516" xlink:href="xyl-20200331.xsd#xyl_AppliedWaterMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c1d3adcc-f0a6-4740-b2fe-60b1e27ba84b" xlink:to="loc_xyl_AppliedWaterMember_dca1e0f2-adb7-41f7-a729-3758ceee4516" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_2e19e6bb-a266-49dd-a151-08ef36a8a97d" xlink:href="xyl-20200331.xsd#xyl_MeasurementandControlSolutionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c1d3adcc-f0a6-4740-b2fe-60b1e27ba84b" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_2e19e6bb-a266-49dd-a151-08ef36a8a97d" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_dedb8fc7-b091-4eaf-8725-c475029c5e0b" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_c7ae9eda-924b-4fc4-8e2b-06bd50333bca" xlink:to="loc_srt_ProductOrServiceAxis_dedb8fc7-b091-4eaf-8725-c475029c5e0b" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_dedb8fc7-b091-4eaf-8725-c475029c5e0b_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_dedb8fc7-b091-4eaf-8725-c475029c5e0b" xlink:to="loc_srt_ProductsAndServicesDomain_dedb8fc7-b091-4eaf-8725-c475029c5e0b_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_3520d700-6881-4090-b4b4-369697506700" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_dedb8fc7-b091-4eaf-8725-c475029c5e0b" xlink:to="loc_srt_ProductsAndServicesDomain_3520d700-6881-4090-b4b4-369697506700" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_TransportMember_1070dd3a-ccd3-4579-9f1e-e8ad5628ba9b" xlink:href="xyl-20200331.xsd#xyl_TransportMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3520d700-6881-4090-b4b4-369697506700" xlink:to="loc_xyl_TransportMember_1070dd3a-ccd3-4579-9f1e-e8ad5628ba9b" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_TreatmentMember_9596bdcb-5646-45a0-99cc-f20742cfa538" xlink:href="xyl-20200331.xsd#xyl_TreatmentMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3520d700-6881-4090-b4b4-369697506700" xlink:to="loc_xyl_TreatmentMember_9596bdcb-5646-45a0-99cc-f20742cfa538" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_BuildingServicesMember_93c5ada3-2e7a-4ac8-b187-de878e4c12d1" xlink:href="xyl-20200331.xsd#xyl_BuildingServicesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3520d700-6881-4090-b4b4-369697506700" xlink:to="loc_xyl_BuildingServicesMember_93c5ada3-2e7a-4ac8-b187-de878e4c12d1" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_IndustrialWaterMember_2d9b3802-53e8-4519-a0d2-c70d75c52475" xlink:href="xyl-20200331.xsd#xyl_IndustrialWaterMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3520d700-6881-4090-b4b4-369697506700" xlink:to="loc_xyl_IndustrialWaterMember_2d9b3802-53e8-4519-a0d2-c70d75c52475" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryWaterMember_3ceffee0-f21c-4619-beee-600c4640d949" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PublicUtilitiesInventoryWaterMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3520d700-6881-4090-b4b4-369697506700" xlink:to="loc_us-gaap_PublicUtilitiesInventoryWaterMember_3ceffee0-f21c-4619-beee-600c4640d949" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_ElectricMember_905b765f-6904-4dde-9851-00d736d1f2f5" xlink:href="xyl-20200331.xsd#xyl_ElectricMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3520d700-6881-4090-b4b4-369697506700" xlink:to="loc_xyl_ElectricMember_905b765f-6904-4dde-9851-00d736d1f2f5" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SoftwareAndServicesOtherMember_3520610c-c16f-43d6-9658-afbfd0f74a6b" xlink:href="xyl-20200331.xsd#xyl_SoftwareAndServicesOtherMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3520d700-6881-4090-b4b4-369697506700" xlink:to="loc_xyl_SoftwareAndServicesOtherMember_3520610c-c16f-43d6-9658-afbfd0f74a6b" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_TestMember_86fa544a-5d74-4ea0-b0a6-538c3c34c466" xlink:href="xyl-20200331.xsd#xyl_TestMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3520d700-6881-4090-b4b4-369697506700" xlink:to="loc_xyl_TestMember_86fa544a-5d74-4ea0-b0a6-538c3c34c466" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_e4b25a3d-e5a3-4733-a401-b2ce59f9befd" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_c7ae9eda-924b-4fc4-8e2b-06bd50333bca" xlink:to="loc_srt_StatementGeographicalAxis_e4b25a3d-e5a3-4733-a401-b2ce59f9befd" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_e4b25a3d-e5a3-4733-a401-b2ce59f9befd_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_e4b25a3d-e5a3-4733-a401-b2ce59f9befd" xlink:to="loc_srt_SegmentGeographicalDomain_e4b25a3d-e5a3-4733-a401-b2ce59f9befd_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_37dd8a0e-b3c7-414f-a565-e5d438494a56" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_e4b25a3d-e5a3-4733-a401-b2ce59f9befd" xlink:to="loc_srt_SegmentGeographicalDomain_37dd8a0e-b3c7-414f-a565-e5d438494a56" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_country_US_f74705fb-07cb-4dd2-b141-7daaec1e8566" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_37dd8a0e-b3c7-414f-a565-e5d438494a56" xlink:to="loc_country_US_f74705fb-07cb-4dd2-b141-7daaec1e8566" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_EuropeMember_8b6bb427-e960-4ba6-a91e-61d8a57645e5" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EuropeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_37dd8a0e-b3c7-414f-a565-e5d438494a56" xlink:to="loc_srt_EuropeMember_8b6bb427-e960-4ba6-a91e-61d8a57645e5" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_AsiaPacificMember_da495c10-c5be-4e4f-a91d-d729441ef52f" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AsiaPacificMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_37dd8a0e-b3c7-414f-a565-e5d438494a56" xlink:to="loc_srt_AsiaPacificMember_da495c10-c5be-4e4f-a91d-d729441ef52f" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_OtherGeographicalRegionsMember_d52eed52-7fc7-4af9-b827-79499f48fc21" xlink:href="xyl-20200331.xsd#xyl_OtherGeographicalRegionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_37dd8a0e-b3c7-414f-a565-e5d438494a56" xlink:to="loc_xyl_OtherGeographicalRegionsMember_d52eed52-7fc7-4af9-b827-79499f48fc21" xlink:type="arc" order="3"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/RevenueDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#RevenueDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RevenueDetails" xlink:type="extended" id="i32e0c3477d764a79977a3ca520a9f201_RevenueDetails"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/RevenueNarrativeDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#RevenueNarrativeDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RevenueNarrativeDetails" xlink:type="extended" id="ie40db543ca2d474ab164d39c16c76f51_RevenueNarrativeDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_0af9d24a-626d-4e34-8353-5744be3f3a3e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_9a11f7fd-09d5-49ea-a392-65849a2d3db5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_0af9d24a-626d-4e34-8353-5744be3f3a3e" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_9a11f7fd-09d5-49ea-a392-65849a2d3db5" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_d5d72105-6962-497a-bd61-28c8df0f77c1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_0af9d24a-626d-4e34-8353-5744be3f3a3e" xlink:to="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_d5d72105-6962-497a-bd61-28c8df0f77c1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_f08ebff0-7528-4014-ae5d-06b8bcdb1075" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_d5d72105-6962-497a-bd61-28c8df0f77c1" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_f08ebff0-7528-4014-ae5d-06b8bcdb1075" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/RevenueNarrativeDetails_1" xlink:type="simple" xlink:href="xyl-20200331.xsd#RevenueNarrativeDetails_1"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/RevenueNarrativeDetails_1" xlink:type="extended" id="i5c787909aef14b4984494cbd130a8297_RevenueNarrativeDetails_1">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_0af9d24a-626d-4e34-8353-5744be3f3a3e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_9a11f7fd-09d5-49ea-a392-65849a2d3db5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_0af9d24a-626d-4e34-8353-5744be3f3a3e" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_9a11f7fd-09d5-49ea-a392-65849a2d3db5" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_d5d72105-6962-497a-bd61-28c8df0f77c1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_0af9d24a-626d-4e34-8353-5744be3f3a3e" xlink:to="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_d5d72105-6962-497a-bd61-28c8df0f77c1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/IncomeTaxes" xlink:type="simple" xlink:href="xyl-20200331.xsd#IncomeTaxes"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/IncomeTaxes" xlink:type="extended" id="id4761f6a6e3d4ed4b3ff0d8a03ca8fd2_IncomeTaxes"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/IncomeTaxesTextualsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#IncomeTaxesTextualsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/IncomeTaxesTextualsDetails" xlink:type="extended" id="i61ef4213555841e49728181268cbdc96_IncomeTaxesTextualsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxContingencyLineItems_37fa5a03-bba0-454f-99a1-be75b1e4e355" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxContingencyLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations_e583919f-a566-4be5-99fa-fcdc45b59ee7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_37fa5a03-bba0-454f-99a1-be75b1e4e355" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations_e583919f-a566-4be5-99fa-fcdc45b59ee7" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxContingencyTable_4295340a-3baf-47e3-b97c-6b587e05e59c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxContingencyTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_37fa5a03-bba0-454f-99a1-be75b1e4e355" xlink:to="loc_us-gaap_IncomeTaxContingencyTable_4295340a-3baf-47e3-b97c-6b587e05e59c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_dfce5192-97cd-4166-9215-3e92b86539a1" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementScenarioAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_4295340a-3baf-47e3-b97c-6b587e05e59c" xlink:to="loc_srt_StatementScenarioAxis_dfce5192-97cd-4166-9215-3e92b86539a1" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_dfce5192-97cd-4166-9215-3e92b86539a1_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_dfce5192-97cd-4166-9215-3e92b86539a1" xlink:to="loc_srt_ScenarioUnspecifiedDomain_dfce5192-97cd-4166-9215-3e92b86539a1_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_19ccdac9-214b-408b-a467-3eef032dd3bd" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_dfce5192-97cd-4166-9215-3e92b86539a1" xlink:to="loc_srt_ScenarioUnspecifiedDomain_19ccdac9-214b-408b-a467-3eef032dd3bd" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_ff16ee36-743c-4422-9432-3479e11efe64" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioForecastMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_19ccdac9-214b-408b-a467-3eef032dd3bd" xlink:to="loc_srt_ScenarioForecastMember_ff16ee36-743c-4422-9432-3479e11efe64" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/EarningsPerShare" xlink:type="simple" xlink:href="xyl-20200331.xsd#EarningsPerShare"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/EarningsPerShare" xlink:type="extended" id="i4181f7880f284bfbb1c981fac32fdb5d_EarningsPerShare"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/EarningsPerShareTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#EarningsPerShareTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/EarningsPerShareTables" xlink:type="extended" id="i118c75f54fc54abba4c6d8f0516d386c_EarningsPerShareTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/EarningsPerShareCalculationsforEPSDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#EarningsPerShareCalculationsforEPSDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/EarningsPerShareCalculationsforEPSDetails" xlink:type="extended" id="ifd68ba77f66a4d1a975bbc70cacde82c_EarningsPerShareCalculationsforEPSDetails">
<link:loc xlink:type="locator" xlink:label="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedLineItems_76cee804-57a3-454a-b099-c1ec4dc33671" xlink:href="xyl-20200331.xsd#xyl_ScheduleOfEarningsPerShareBasicAndDilutedLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareReconciliationAbstract_074a0408-5124-4597-885a-1898bd4758cf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareReconciliationAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedLineItems_76cee804-57a3-454a-b099-c1ec4dc33671" xlink:to="loc_us-gaap_EarningsPerShareReconciliationAbstract_074a0408-5124-4597-885a-1898bd4758cf" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_6901fe75-dc83-4d6f-bf95-c74ebdf10916" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_074a0408-5124-4597-885a-1898bd4758cf" xlink:to="loc_us-gaap_NetIncomeLoss_6901fe75-dc83-4d6f-bf95-c74ebdf10916" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_8fa9e6f3-4192-4201-adb2-83e88abc09f7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_074a0408-5124-4597-885a-1898bd4758cf" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_8fa9e6f3-4192-4201-adb2-83e88abc09f7" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesIssuedBasic_549bab8b-5e1e-43de-9d51-260f09d3b46d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesIssuedBasic"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_8fa9e6f3-4192-4201-adb2-83e88abc09f7" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesIssuedBasic_549bab8b-5e1e-43de-9d51-260f09d3b46d" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights_f654ce3a-ffda-45ea-b89e-7375eae97455" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_8fa9e6f3-4192-4201-adb2-83e88abc09f7" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights_f654ce3a-ffda-45ea-b89e-7375eae97455" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_83160d17-b02d-43f4-8278-deb43d4bb16a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_8fa9e6f3-4192-4201-adb2-83e88abc09f7" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_83160d17-b02d-43f4-8278-deb43d4bb16a" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_ff8a449c-d73b-43de-9cc4-dba884db68d1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareReconciliationAbstract_074a0408-5124-4597-885a-1898bd4758cf" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_ff8a449c-d73b-43de-9cc4-dba884db68d1" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_5c7e6d3a-6d40-448e-a8ae-f335114cd58a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_ff8a449c-d73b-43de-9cc4-dba884db68d1" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_5c7e6d3a-6d40-448e-a8ae-f335114cd58a" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_50eb3b8b-73aa-458f-89f9-9699a9f6bf56" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_ff8a449c-d73b-43de-9cc4-dba884db68d1" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_50eb3b8b-73aa-458f-89f9-9699a9f6bf56" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_e17d0892-2467-481e-917a-93e1fc390827" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasic"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_ff8a449c-d73b-43de-9cc4-dba884db68d1" xlink:to="loc_us-gaap_EarningsPerShareBasic_e17d0892-2467-481e-917a-93e1fc390827" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_27872b66-3673-4481-86e3-29b1512fd8a4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareDiluted"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_ff8a449c-d73b-43de-9cc4-dba884db68d1" xlink:to="loc_us-gaap_EarningsPerShareDiluted_27872b66-3673-4481-86e3-29b1512fd8a4" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedTable_0f08a707-3d9d-47d9-a653-a1b10088dd33" xlink:href="xyl-20200331.xsd#xyl_ScheduleOfEarningsPerShareBasicAndDilutedTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedLineItems_76cee804-57a3-454a-b099-c1ec4dc33671" xlink:to="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedTable_0f08a707-3d9d-47d9-a653-a1b10088dd33" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_02e5a221-4796-4a3a-a722-e550fa013000" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_xyl_ScheduleOfEarningsPerShareBasicAndDilutedTable_0f08a707-3d9d-47d9-a653-a1b10088dd33" xlink:to="loc_us-gaap_AwardTypeAxis_02e5a221-4796-4a3a-a722-e550fa013000" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_02e5a221-4796-4a3a-a722-e550fa013000_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_02e5a221-4796-4a3a-a722-e550fa013000" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_02e5a221-4796-4a3a-a722-e550fa013000_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_da815efd-f7f2-499b-874b-7f04ee6115b1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_02e5a221-4796-4a3a-a722-e550fa013000" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_da815efd-f7f2-499b-874b-7f04ee6115b1" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_4be50cb8-40a8-45d3-affa-0a62ddac3b6c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_da815efd-f7f2-499b-874b-7f04ee6115b1" xlink:to="loc_us-gaap_EmployeeStockOptionMember_4be50cb8-40a8-45d3-affa-0a62ddac3b6c" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_e10502fc-283f-40f0-9144-765659950339" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_da815efd-f7f2-499b-874b-7f04ee6115b1" xlink:to="loc_us-gaap_RestrictedStockMember_e10502fc-283f-40f0-9144-765659950339" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/EarningsPerShareSummaryofAntidilutiveSecuritiesDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#EarningsPerShareSummaryofAntidilutiveSecuritiesDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/EarningsPerShareSummaryofAntidilutiveSecuritiesDetails" xlink:type="extended" id="i0fc72bc3517a4728b97d04ee7d030ec8_EarningsPerShareSummaryofAntidilutiveSecuritiesDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_155941bd-81f8-4a3e-8dd0-f9bef428707e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAbstract_2e926381-15b1-4a4f-b59a-06c4604a79ce" xlink:href="xyl-20200331.xsd#xyl_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_155941bd-81f8-4a3e-8dd0-f9bef428707e" xlink:to="loc_xyl_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAbstract_2e926381-15b1-4a4f-b59a-06c4604a79ce" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_1e14b09f-f3e3-42e7-9747-afca78cadd1b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAbstract_2e926381-15b1-4a4f-b59a-06c4604a79ce" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_1e14b09f-f3e3-42e7-9747-afca78cadd1b" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_0c81dd6c-a7c8-4787-9452-5041779e70a7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_155941bd-81f8-4a3e-8dd0-f9bef428707e" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_0c81dd6c-a7c8-4787-9452-5041779e70a7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bc4ac38b-eddf-41db-9364-0d64b08ef437" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_0c81dd6c-a7c8-4787-9452-5041779e70a7" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bc4ac38b-eddf-41db-9364-0d64b08ef437" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_bc4ac38b-eddf-41db-9364-0d64b08ef437_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bc4ac38b-eddf-41db-9364-0d64b08ef437" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_bc4ac38b-eddf-41db-9364-0d64b08ef437_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_5c98bbbd-1c08-465e-87bf-60f146fce987" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bc4ac38b-eddf-41db-9364-0d64b08ef437" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_5c98bbbd-1c08-465e-87bf-60f146fce987" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_df95a084-b35f-4dfc-b091-22924208130f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_5c98bbbd-1c08-465e-87bf-60f146fce987" xlink:to="loc_us-gaap_EmployeeStockOptionMember_df95a084-b35f-4dfc-b091-22924208130f" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_ae6c4cf6-af25-48bd-b100-62c23eff3109" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_5c98bbbd-1c08-465e-87bf-60f146fce987" xlink:to="loc_us-gaap_RestrictedStockMember_ae6c4cf6-af25-48bd-b100-62c23eff3109" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_acd29f3b-dcf1-4640-834e-4d7a866e4684" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_5c98bbbd-1c08-465e-87bf-60f146fce987" xlink:to="loc_us-gaap_PerformanceSharesMember_acd29f3b-dcf1-4640-834e-4d7a866e4684" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/Inventories" xlink:type="simple" xlink:href="xyl-20200331.xsd#Inventories"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/Inventories" xlink:type="extended" id="i0bf44f3fc40944f3878d7a16560bb4f0_Inventories"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/InventoriesTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#InventoriesTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/InventoriesTables" xlink:type="extended" id="i2c960ed225824435a951dcfafc2116e2_InventoriesTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/InventoriesDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#InventoriesDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/InventoriesDetails" xlink:type="extended" id="i69314331887f4eeda0401c7cc4f75cfd_InventoriesDetails"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssets" xlink:type="simple" xlink:href="xyl-20200331.xsd#GoodwillandOtherIntangibleAssets"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssets" xlink:type="extended" id="i851116782dce41178246ffb392c722a0_GoodwillandOtherIntangibleAssets"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#GoodwillandOtherIntangibleAssetsTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsTables" xlink:type="extended" id="ibd2f6247180048a2a1fca1ae7ae43bbf_GoodwillandOtherIntangibleAssetsTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsGoodwillRollforwardDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#GoodwillandOtherIntangibleAssetsGoodwillRollforwardDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsGoodwillRollforwardDetails" xlink:type="extended" id="i12f05e7bedff4a35aa9711263549f7e2_GoodwillandOtherIntangibleAssetsGoodwillRollforwardDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems_e68b773a-5483-48c7-801f-e715be7545fc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_7f756d0c-62b4-4085-ae2b-e919b75606b9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems_e68b773a-5483-48c7-801f-e715be7545fc" xlink:to="loc_us-gaap_GoodwillRollForward_7f756d0c-62b4-4085-ae2b-e919b75606b9" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_0c70c521-17d1-4792-8bbd-dba1613e12b7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_7f756d0c-62b4-4085-ae2b-e919b75606b9" xlink:to="loc_us-gaap_Goodwill_0c70c521-17d1-4792-8bbd-dba1613e12b7" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_1af0ffac-bbce-49f6-a138-dc3ee447feb6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_7f756d0c-62b4-4085-ae2b-e919b75606b9" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_1af0ffac-bbce-49f6-a138-dc3ee447feb6" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_26ca6e93-511b-4720-9b96-39a3fb60b759" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentTable_607eca10-8070-43df-b531-c164594892b7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PublicUtilityPropertyPlantAndEquipmentTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems_e68b773a-5483-48c7-801f-e715be7545fc" xlink:to="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentTable_607eca10-8070-43df-b531-c164594892b7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_8f774ecb-3077-4a41-afc5-d3256f4d916a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilityPropertyPlantAndEquipmentTable_607eca10-8070-43df-b531-c164594892b7" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_8f774ecb-3077-4a41-afc5-d3256f4d916a" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_8f774ecb-3077-4a41-afc5-d3256f4d916a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_8f774ecb-3077-4a41-afc5-d3256f4d916a" xlink:to="loc_us-gaap_SegmentDomain_8f774ecb-3077-4a41-afc5-d3256f4d916a_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ac1b6950-9619-4558-8f82-bfb35a339500" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_8f774ecb-3077-4a41-afc5-d3256f4d916a" xlink:to="loc_us-gaap_SegmentDomain_ac1b6950-9619-4558-8f82-bfb35a339500" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_17a797e7-354a-4c68-b754-1e57341a1378" xlink:href="xyl-20200331.xsd#xyl_WaterInfrastructureMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ac1b6950-9619-4558-8f82-bfb35a339500" xlink:to="loc_xyl_WaterInfrastructureMember_17a797e7-354a-4c68-b754-1e57341a1378" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_2f7ac964-7d32-4f82-b7b5-c3aaf10315a0" xlink:href="xyl-20200331.xsd#xyl_AppliedWaterMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ac1b6950-9619-4558-8f82-bfb35a339500" xlink:to="loc_xyl_AppliedWaterMember_2f7ac964-7d32-4f82-b7b5-c3aaf10315a0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_0523b715-99e8-46fd-b4a9-435029abca97" xlink:href="xyl-20200331.xsd#xyl_MeasurementandControlSolutionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ac1b6950-9619-4558-8f82-bfb35a339500" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_0523b715-99e8-46fd-b4a9-435029abca97" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsSummaryofIntangibleAssetsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#GoodwillandOtherIntangibleAssetsSummaryofIntangibleAssetsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsSummaryofIntangibleAssetsDetails" xlink:type="extended" id="i170e54ce689943f4b9e5761c0e920a28_GoodwillandOtherIntangibleAssetsSummaryofIntangibleAssetsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_60871f8e-e29e-40d0-8673-ea0a2dbb3c64" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_f9d327bc-84e7-4a1c-8a35-36dbeb3b3cde" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_60871f8e-e29e-40d0-8673-ea0a2dbb3c64" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_f9d327bc-84e7-4a1c-8a35-36dbeb3b3cde" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_f6fd7422-1070-42c9-aa0e-f3f9335f2554" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_f9d327bc-84e7-4a1c-8a35-36dbeb3b3cde" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_f6fd7422-1070-42c9-aa0e-f3f9335f2554" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_6510e87a-e345-409c-8b62-9e11087d2dbc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_f9d327bc-84e7-4a1c-8a35-36dbeb3b3cde" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_6510e87a-e345-409c-8b62-9e11087d2dbc" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_8f49dd17-2ce4-477d-8e8b-f434850f5b59" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_f9d327bc-84e7-4a1c-8a35-36dbeb3b3cde" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_8f49dd17-2ce4-477d-8e8b-f434850f5b59" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_2f31ce85-763b-4b8c-aa9b-ac0cd35d9266" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_f9d327bc-84e7-4a1c-8a35-36dbeb3b3cde" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_2f31ce85-763b-4b8c-aa9b-ac0cd35d9266" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_82951d42-9046-4702-bf8c-bd64b8bc783f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_f9d327bc-84e7-4a1c-8a35-36dbeb3b3cde" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_82951d42-9046-4702-bf8c-bd64b8bc783f" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_87a64e5b-ef93-4014-af3f-c6740ef262c1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_f9d327bc-84e7-4a1c-8a35-36dbeb3b3cde" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_87a64e5b-ef93-4014-af3f-c6740ef262c1" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_7bf7b27b-8708-4136-acce-32fb750ac360" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_60871f8e-e29e-40d0-8673-ea0a2dbb3c64" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_7bf7b27b-8708-4136-acce-32fb750ac360" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_ffdd57bc-713e-4b80-be27-a09acf4338ff" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_60871f8e-e29e-40d0-8673-ea0a2dbb3c64" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_ffdd57bc-713e-4b80-be27-a09acf4338ff" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_13cf861c-1670-4374-8d0c-051bbbcf7620" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_ffdd57bc-713e-4b80-be27-a09acf4338ff" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_13cf861c-1670-4374-8d0c-051bbbcf7620" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_13cf861c-1670-4374-8d0c-051bbbcf7620_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_13cf861c-1670-4374-8d0c-051bbbcf7620" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_13cf861c-1670-4374-8d0c-051bbbcf7620_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa932b87-eeeb-4cc0-a60a-9c197993fa86" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_13cf861c-1670-4374-8d0c-051bbbcf7620" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa932b87-eeeb-4cc0-a60a-9c197993fa86" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_2ca059d4-8d2c-4da7-9958-46a73e7cc8d9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CustomerRelationshipsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa932b87-eeeb-4cc0-a60a-9c197993fa86" xlink:to="loc_us-gaap_CustomerRelationshipsMember_2ca059d4-8d2c-4da7-9958-46a73e7cc8d9" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_ProprietaryandPatentedTechnologyMember_4f1faff5-b615-4b87-b899-9d65ad296c66" xlink:href="xyl-20200331.xsd#xyl_ProprietaryandPatentedTechnologyMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa932b87-eeeb-4cc0-a60a-9c197993fa86" xlink:to="loc_xyl_ProprietaryandPatentedTechnologyMember_4f1faff5-b615-4b87-b899-9d65ad296c66" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksMember_a0e16157-a30e-4a4e-ab5b-001bf35825ef" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TrademarksMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa932b87-eeeb-4cc0-a60a-9c197993fa86" xlink:to="loc_us-gaap_TrademarksMember_a0e16157-a30e-4a4e-ab5b-001bf35825ef" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_9cc3b090-7976-4723-849f-7aab544b3766" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SoftwareDevelopmentMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa932b87-eeeb-4cc0-a60a-9c197993fa86" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_9cc3b090-7976-4723-849f-7aab544b3766" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_ff225f1c-2b63-4059-8b9c-92a4a4f6edb0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherIntangibleAssetsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa932b87-eeeb-4cc0-a60a-9c197993fa86" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_ff225f1c-2b63-4059-8b9c-92a4a4f6edb0" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnclassifiedIndefinitelivedIntangibleAssetsMember_5439e62e-7df0-468e-9de1-af308a1aa649" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnclassifiedIndefinitelivedIntangibleAssetsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_aa932b87-eeeb-4cc0-a60a-9c197993fa86" xlink:to="loc_us-gaap_UnclassifiedIndefinitelivedIntangibleAssetsMember_5439e62e-7df0-468e-9de1-af308a1aa649" xlink:type="arc" order="5"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsDetailsTextual" xlink:type="simple" xlink:href="xyl-20200331.xsd#GoodwillandOtherIntangibleAssetsDetailsTextual"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/GoodwillandOtherIntangibleAssetsDetailsTextual" xlink:type="extended" id="id6635dba8d634c2b9ce50c006ea9c87b_GoodwillandOtherIntangibleAssetsDetailsTextual"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/DerivativeFinancialInstruments" xlink:type="simple" xlink:href="xyl-20200331.xsd#DerivativeFinancialInstruments"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/DerivativeFinancialInstruments" xlink:type="extended" id="i19a451c816144d2cb8ca00642899b8cb_DerivativeFinancialInstruments"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#DerivativeFinancialInstrumentsTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsTables" xlink:type="extended" id="i35052a24378840bba3b8be5a931bc159_DerivativeFinancialInstrumentsTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsEffectofDeriativeInstrumentsonIncomeStatementandStatementofComprehensiveIncomeDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#DerivativeFinancialInstrumentsEffectofDeriativeInstrumentsonIncomeStatementandStatementofComprehensiveIncomeDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsEffectofDeriativeInstrumentsonIncomeStatementandStatementofComprehensiveIncomeDetails" xlink:type="extended" id="iff514a6dc29848a5b189e07b2d87d6f4_DerivativeFinancialInstrumentsEffectofDeriativeInstrumentsonIncomeStatementandStatementofComprehensiveIncomeDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_915f1863-2176-4ef6-a9e7-0e48d3868e67" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract_b66e25ce-6b52-4740-8837-5e9fdf70e020" xlink:href="xyl-20200331.xsd#xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_915f1863-2176-4ef6-a9e7-0e48d3868e67" xlink:to="loc_xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract_b66e25ce-6b52-4740-8837-5e9fdf70e020" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnForeignCurrencyDerivativesNetBeforeTax_ad866813-fb13-4190-970c-bcb2f94b0f12" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrealizedGainLossOnForeignCurrencyDerivativesNetBeforeTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract_b66e25ce-6b52-4740-8837-5e9fdf70e020" xlink:to="loc_us-gaap_UnrealizedGainLossOnForeignCurrencyDerivativesNetBeforeTax_ad866813-fb13-4190-970c-bcb2f94b0f12" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_6aa9f1e2-f35d-4411-9c09-5f9b916685a9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Revenues"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract_b66e25ce-6b52-4740-8837-5e9fdf70e020" xlink:to="loc_us-gaap_Revenues_6aa9f1e2-f35d-4411-9c09-5f9b916685a9" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_e1fecd93-bb43-4a26-a126-f2094e64bd65" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_DerivativeInstrumentsGainsLossesInStatementOfFinancialPerformanceAbstract_b66e25ce-6b52-4740-8837-5e9fdf70e020" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_e1fecd93-bb43-4a26-a126-f2094e64bd65" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_a7ef78ab-10ad-4093-9c56-1fc28412ce83" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_915f1863-2176-4ef6-a9e7-0e48d3868e67" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_a7ef78ab-10ad-4093-9c56-1fc28412ce83" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_ccda44cf-a251-4ae5-8032-87645d511057" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_a7ef78ab-10ad-4093-9c56-1fc28412ce83" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_ccda44cf-a251-4ae5-8032-87645d511057" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_ccda44cf-a251-4ae5-8032-87645d511057_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_ccda44cf-a251-4ae5-8032-87645d511057" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_ccda44cf-a251-4ae5-8032-87645d511057_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_567e30a8-21e6-4094-b1ce-1caf7037b1f5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_ccda44cf-a251-4ae5-8032-87645d511057" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_567e30a8-21e6-4094-b1ce-1caf7037b1f5" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseMember_e1dc006f-2ef0-41d5-bcad-0ccb9fd50878" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpenseMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_567e30a8-21e6-4094-b1ce-1caf7037b1f5" xlink:to="loc_us-gaap_InterestExpenseMember_e1dc006f-2ef0-41d5-bcad-0ccb9fd50878" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_330e61e2-59a4-4cf1-a9ce-8f41322cfa77" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLocationAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_a7ef78ab-10ad-4093-9c56-1fc28412ce83" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_330e61e2-59a4-4cf1-a9ce-8f41322cfa77" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_330e61e2-59a4-4cf1-a9ce-8f41322cfa77_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLocationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_330e61e2-59a4-4cf1-a9ce-8f41322cfa77" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_330e61e2-59a4-4cf1-a9ce-8f41322cfa77_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_b638a816-aab4-4da9-b923-2e766f95b66a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLocationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_330e61e2-59a4-4cf1-a9ce-8f41322cfa77" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_b638a816-aab4-4da9-b923-2e766f95b66a" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeMember_8742f1a4-e675-4714-85d4-7c4967a8ea67" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_b638a816-aab4-4da9-b923-2e766f95b66a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeMember_8742f1a4-e675-4714-85d4-7c4967a8ea67" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_2bf2c9f5-4d4e-4ed0-9070-092b89629748" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_a7ef78ab-10ad-4093-9c56-1fc28412ce83" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_2bf2c9f5-4d4e-4ed0-9070-092b89629748" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_2bf2c9f5-4d4e-4ed0-9070-092b89629748_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_2bf2c9f5-4d4e-4ed0-9070-092b89629748" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_2bf2c9f5-4d4e-4ed0-9070-092b89629748_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_045dd5cf-05e9-4c87-a9d2-b06667c52f69" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_2bf2c9f5-4d4e-4ed0-9070-092b89629748" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_045dd5cf-05e9-4c87-a9d2-b06667c52f69" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_be5ad158-6e10-4458-9d9c-0338dfdc4165" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_045dd5cf-05e9-4c87-a9d2-b06667c52f69" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_be5ad158-6e10-4458-9d9c-0338dfdc4165" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_1cb0347a-4ee8-4063-aa31-360a02a3a7bb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_a7ef78ab-10ad-4093-9c56-1fc28412ce83" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_1cb0347a-4ee8-4063-aa31-360a02a3a7bb" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_1cb0347a-4ee8-4063-aa31-360a02a3a7bb_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_1cb0347a-4ee8-4063-aa31-360a02a3a7bb" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_1cb0347a-4ee8-4063-aa31-360a02a3a7bb_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_d99a48ad-1a8d-4a7b-a73d-99fd898f9f46" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_1cb0347a-4ee8-4063-aa31-360a02a3a7bb" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_d99a48ad-1a8d-4a7b-a73d-99fd898f9f46" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_b8e9abd5-419d-4da4-a35c-ecba15d0adcf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_d99a48ad-1a8d-4a7b-a73d-99fd898f9f46" xlink:to="loc_us-gaap_ForeignExchangeContractMember_b8e9abd5-419d-4da4-a35c-ecba15d0adcf" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CrossCurrencyInterestRateContractMember_7f492931-73b5-4760-9e21-8ba149b3cd38" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CrossCurrencyInterestRateContractMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_d99a48ad-1a8d-4a7b-a73d-99fd898f9f46" xlink:to="loc_us-gaap_CrossCurrencyInterestRateContractMember_7f492931-73b5-4760-9e21-8ba149b3cd38" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_ForeignCurrencyDenominatedDebtMember_6f40bbbb-f68e-4ab0-9c7c-20912cc06c3f" xlink:href="xyl-20200331.xsd#xyl_ForeignCurrencyDenominatedDebtMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_d99a48ad-1a8d-4a7b-a73d-99fd898f9f46" xlink:to="loc_xyl_ForeignCurrencyDenominatedDebtMember_6f40bbbb-f68e-4ab0-9c7c-20912cc06c3f" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsBalanceSheetLocationofDerivativeInstrumentsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#DerivativeFinancialInstrumentsBalanceSheetLocationofDerivativeInstrumentsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsBalanceSheetLocationofDerivativeInstrumentsDetails" xlink:type="extended" id="i8d8bd1720abd4641a3a9a689d1b418b3_DerivativeFinancialInstrumentsBalanceSheetLocationofDerivativeInstrumentsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_29d45fc4-dfac-4407-b189-0e073c041fb0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativesFairValueLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue_24e4b962-7fed-4c4a-9f52-ce368d04ba88" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_29d45fc4-dfac-4407-b189-0e073c041fb0" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeAssetAtFairValue_24e4b962-7fed-4c4a-9f52-ce368d04ba88" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeLiabilityAtFairValue_7154551a-a656-4fd6-8b3c-7480debe09c9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyCashFlowHedgeLiabilityAtFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_29d45fc4-dfac-4407-b189-0e073c041fb0" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeLiabilityAtFairValue_7154551a-a656-4fd6-8b3c-7480debe09c9" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_247b73a7-0d71-4608-97c3-7aff732bc5e4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_29d45fc4-dfac-4407-b189-0e073c041fb0" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_247b73a7-0d71-4608-97c3-7aff732bc5e4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_49143c9f-bc36-4e10-b116-002a212828f7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_247b73a7-0d71-4608-97c3-7aff732bc5e4" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_49143c9f-bc36-4e10-b116-002a212828f7" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_49143c9f-bc36-4e10-b116-002a212828f7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_49143c9f-bc36-4e10-b116-002a212828f7" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_49143c9f-bc36-4e10-b116-002a212828f7_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_e5cbb7a5-4079-4acb-b641-ec636c9acd32" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_49143c9f-bc36-4e10-b116-002a212828f7" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_e5cbb7a5-4079-4acb-b641-ec636c9acd32" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentAssetsMember_d4029122-d1e7-4a8c-8448-2889491c49a9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCurrentAssetsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_e5cbb7a5-4079-4acb-b641-ec636c9acd32" xlink:to="loc_us-gaap_OtherCurrentAssetsMember_d4029122-d1e7-4a8c-8448-2889491c49a9" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentAssetsMember_f329e503-9605-44d0-8765-e6d842fd9c88" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNoncurrentAssetsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_e5cbb7a5-4079-4acb-b641-ec636c9acd32" xlink:to="loc_us-gaap_OtherNoncurrentAssetsMember_f329e503-9605-44d0-8765-e6d842fd9c88" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentLiabilitiesMember_9ebee414-42b1-4a76-b28d-734f23321ec1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCurrentLiabilitiesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_e5cbb7a5-4079-4acb-b641-ec636c9acd32" xlink:to="loc_us-gaap_OtherCurrentLiabilitiesMember_9ebee414-42b1-4a76-b28d-734f23321ec1" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_49491069-8e4a-4eb5-b722-b069c400ab90" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_e5cbb7a5-4079-4acb-b641-ec636c9acd32" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_49491069-8e4a-4eb5-b722-b069c400ab90" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_eef05c1d-baf1-447f-906d-1d0108fc2612" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_247b73a7-0d71-4608-97c3-7aff732bc5e4" xlink:to="loc_us-gaap_HedgingDesignationAxis_eef05c1d-baf1-447f-906d-1d0108fc2612" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_eef05c1d-baf1-447f-906d-1d0108fc2612_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_eef05c1d-baf1-447f-906d-1d0108fc2612" xlink:to="loc_us-gaap_HedgingDesignationDomain_eef05c1d-baf1-447f-906d-1d0108fc2612_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_8c5633f1-8e7e-4578-8036-05874bcf7517" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_eef05c1d-baf1-447f-906d-1d0108fc2612" xlink:to="loc_us-gaap_HedgingDesignationDomain_8c5633f1-8e7e-4578-8036-05874bcf7517" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_d33ebdbf-7402-4ae0-ab0d-b0391bd63acc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_8c5633f1-8e7e-4578-8036-05874bcf7517" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_d33ebdbf-7402-4ae0-ab0d-b0391bd63acc" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsDetailsTextual" xlink:type="simple" xlink:href="xyl-20200331.xsd#DerivativeFinancialInstrumentsDetailsTextual"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/DerivativeFinancialInstrumentsDetailsTextual" xlink:type="extended" id="i6b4c242f08f242fcb6a6810ceec446fe_DerivativeFinancialInstrumentsDetailsTextual">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_755f91d8-c2ae-4765-9f7f-91281142f398" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_62ab6435-eac0-4c04-9e41-a51dd948b253" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeNotionalAmount"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_755f91d8-c2ae-4765-9f7f-91281142f398" xlink:to="loc_us-gaap_DerivativeNotionalAmount_62ab6435-eac0-4c04-9e41-a51dd948b253" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_b7998efe-9124-4a9c-ac58-26ef38452880" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_755f91d8-c2ae-4765-9f7f-91281142f398" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_b7998efe-9124-4a9c-ac58-26ef38452880" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_1ba8efc3-7b6f-4434-a7cd-747f8bb0d345" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_755f91d8-c2ae-4765-9f7f-91281142f398" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_1ba8efc3-7b6f-4434-a7cd-747f8bb0d345" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet_5a7d9b80-e089-4368-a2c0-96ead2e01f0e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_755f91d8-c2ae-4765-9f7f-91281142f398" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet_5a7d9b80-e089-4368-a2c0-96ead2e01f0e" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_bb154162-df53-4c5f-ae32-5e0640a258ce" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_755f91d8-c2ae-4765-9f7f-91281142f398" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_bb154162-df53-4c5f-ae32-5e0640a258ce" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_7f8448bb-d8f6-4a7d-b91d-8425e18066b4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_755f91d8-c2ae-4765-9f7f-91281142f398" xlink:to="loc_us-gaap_LongTermDebtFairValue_7f8448bb-d8f6-4a7d-b91d-8425e18066b4" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_2bd9eff5-8033-4a1a-85d0-64efeb95fa8a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_755f91d8-c2ae-4765-9f7f-91281142f398" xlink:to="loc_us-gaap_DerivativeTable_2bd9eff5-8033-4a1a-85d0-64efeb95fa8a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_5dfcff22-a4bf-4a91-bce1-d1f2b788f202" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_2bd9eff5-8033-4a1a-85d0-64efeb95fa8a" xlink:to="loc_us-gaap_DebtInstrumentAxis_5dfcff22-a4bf-4a91-bce1-d1f2b788f202" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_5dfcff22-a4bf-4a91-bce1-d1f2b788f202_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_5dfcff22-a4bf-4a91-bce1-d1f2b788f202" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_5dfcff22-a4bf-4a91-bce1-d1f2b788f202_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_bff72c1b-0b37-49b4-9778-9ce25469c4f1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_5dfcff22-a4bf-4a91-bce1-d1f2b788f202" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_bff72c1b-0b37-49b4-9778-9ce25469c4f1" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_8fea0c27-eb2b-4788-99ef-60cc57b19a0a" xlink:href="xyl-20200331.xsd#xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bff72c1b-0b37-49b4-9778-9ce25469c4f1" xlink:to="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_8fea0c27-eb2b-4788-99ef-60cc57b19a0a" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_d8fd2255-5eac-4f8c-8f56-58cf83a5d872" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_2bd9eff5-8033-4a1a-85d0-64efeb95fa8a" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_d8fd2255-5eac-4f8c-8f56-58cf83a5d872" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_d8fd2255-5eac-4f8c-8f56-58cf83a5d872_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_d8fd2255-5eac-4f8c-8f56-58cf83a5d872" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_d8fd2255-5eac-4f8c-8f56-58cf83a5d872_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_57cb3b5d-939d-4a0b-b789-0ca099274d28" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_d8fd2255-5eac-4f8c-8f56-58cf83a5d872" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_57cb3b5d-939d-4a0b-b789-0ca099274d28" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_12642f81-b859-40ed-acc0-0766bdfbbe2c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeniorNotesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_57cb3b5d-939d-4a0b-b789-0ca099274d28" xlink:to="loc_us-gaap_SeniorNotesMember_12642f81-b859-40ed-acc0-0766bdfbbe2c" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_6298ea53-e109-4a77-b0fd-3b6f67f55833" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_2bd9eff5-8033-4a1a-85d0-64efeb95fa8a" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_6298ea53-e109-4a77-b0fd-3b6f67f55833" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_6298ea53-e109-4a77-b0fd-3b6f67f55833_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_6298ea53-e109-4a77-b0fd-3b6f67f55833" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_6298ea53-e109-4a77-b0fd-3b6f67f55833_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_cde11f06-47f8-4c9a-9dbb-232ecb1f9fc2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_6298ea53-e109-4a77-b0fd-3b6f67f55833" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_cde11f06-47f8-4c9a-9dbb-232ecb1f9fc2" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMember_83c927bd-00e5-43cc-8235-c08550bd1aac" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_cde11f06-47f8-4c9a-9dbb-232ecb1f9fc2" xlink:to="loc_us-gaap_LongTermDebtMember_83c927bd-00e5-43cc-8235-c08550bd1aac" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_20f5c97c-382e-4663-8ea2-157230fd7cb7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_2bd9eff5-8033-4a1a-85d0-64efeb95fa8a" xlink:to="loc_us-gaap_HedgingDesignationAxis_20f5c97c-382e-4663-8ea2-157230fd7cb7" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_20f5c97c-382e-4663-8ea2-157230fd7cb7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_20f5c97c-382e-4663-8ea2-157230fd7cb7" xlink:to="loc_us-gaap_HedgingDesignationDomain_20f5c97c-382e-4663-8ea2-157230fd7cb7_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_b344c1a7-9f24-4cbf-baae-55940b83e640" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_20f5c97c-382e-4663-8ea2-157230fd7cb7" xlink:to="loc_us-gaap_HedgingDesignationDomain_b344c1a7-9f24-4cbf-baae-55940b83e640" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_1d3e83f9-f045-4393-a1d1-ceb354ccc500" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_b344c1a7-9f24-4cbf-baae-55940b83e640" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_1d3e83f9-f045-4393-a1d1-ceb354ccc500" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_88d526c9-8d3f-40fd-b014-4530250bad1a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_2bd9eff5-8033-4a1a-85d0-64efeb95fa8a" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_88d526c9-8d3f-40fd-b014-4530250bad1a" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_88d526c9-8d3f-40fd-b014-4530250bad1a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_88d526c9-8d3f-40fd-b014-4530250bad1a" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_88d526c9-8d3f-40fd-b014-4530250bad1a_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_e6eea081-ff17-4c92-8ab1-0b7ffc45301f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_88d526c9-8d3f-40fd-b014-4530250bad1a" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_e6eea081-ff17-4c92-8ab1-0b7ffc45301f" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_ec7cd257-2c95-42f5-a086-e141a51af3f1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_e6eea081-ff17-4c92-8ab1-0b7ffc45301f" xlink:to="loc_us-gaap_ForeignExchangeContractMember_ec7cd257-2c95-42f5-a086-e141a51af3f1" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SellUSDBuyEURMember_ef6f609d-7cb6-4392-b0a7-5e0b1ec85a2b" xlink:href="xyl-20200331.xsd#xyl_SellUSDBuyEURMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_ec7cd257-2c95-42f5-a086-e141a51af3f1" xlink:to="loc_xyl_SellUSDBuyEURMember_ef6f609d-7cb6-4392-b0a7-5e0b1ec85a2b" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_BuyKRSellEURMember_482b5721-f7d0-4657-9ac6-5c0c9b05a590" xlink:href="xyl-20200331.xsd#xyl_BuyKRSellEURMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_ec7cd257-2c95-42f5-a086-e141a51af3f1" xlink:to="loc_xyl_BuyKRSellEURMember_482b5721-f7d0-4657-9ac6-5c0c9b05a590" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SellGBPBuyEURMember_9c4df77b-ca66-4ac7-b9cb-a1611e72ec3a" xlink:href="xyl-20200331.xsd#xyl_SellGBPBuyEURMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_ec7cd257-2c95-42f5-a086-e141a51af3f1" xlink:to="loc_xyl_SellGBPBuyEURMember_9c4df77b-ca66-4ac7-b9cb-a1611e72ec3a" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SellEURBuyPLNMember_5727b2d5-943d-4cbb-9825-b6415c497c13" xlink:href="xyl-20200331.xsd#xyl_SellEURBuyPLNMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_ec7cd257-2c95-42f5-a086-e141a51af3f1" xlink:to="loc_xyl_SellEURBuyPLNMember_5727b2d5-943d-4cbb-9825-b6415c497c13" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_BuyUSDSellCDNMember_c512aa96-f5ac-4994-b1d2-c6ec75bffb32" xlink:href="xyl-20200331.xsd#xyl_BuyUSDSellCDNMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_ec7cd257-2c95-42f5-a086-e141a51af3f1" xlink:to="loc_xyl_BuyUSDSellCDNMember_c512aa96-f5ac-4994-b1d2-c6ec75bffb32" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SellCDNBuyEURMember_e9b65aae-1e38-4368-8dce-3ff679564481" xlink:href="xyl-20200331.xsd#xyl_SellCDNBuyEURMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignExchangeContractMember_ec7cd257-2c95-42f5-a086-e141a51af3f1" xlink:to="loc_xyl_SellCDNBuyEURMember_e9b65aae-1e38-4368-8dce-3ff679564481" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CrossCurrencyInterestRateContractMember_8731e334-af14-431c-b337-b53fa808b343" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CrossCurrencyInterestRateContractMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_e6eea081-ff17-4c92-8ab1-0b7ffc45301f" xlink:to="loc_us-gaap_CrossCurrencyInterestRateContractMember_8731e334-af14-431c-b337-b53fa808b343" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/AccruedandOtherCurrentLiabilities" xlink:type="simple" xlink:href="xyl-20200331.xsd#AccruedandOtherCurrentLiabilities"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/AccruedandOtherCurrentLiabilities" xlink:type="extended" id="i8b097acc886941a199cb8053e9daf49a_AccruedandOtherCurrentLiabilities"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/AccruedandOtherCurrentLiabilitiesTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#AccruedandOtherCurrentLiabilitiesTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/AccruedandOtherCurrentLiabilitiesTables" xlink:type="extended" id="i9d6afd141d9446838443e24ff7c05f35_AccruedandOtherCurrentLiabilitiesTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/AccruedandOtherCurrentLiabilitiesDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#AccruedandOtherCurrentLiabilitiesDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/AccruedandOtherCurrentLiabilitiesDetails" xlink:type="extended" id="ia257e35dbdba4f70a6b68c076ffe106f_AccruedandOtherCurrentLiabilitiesDetails"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/CreditFacilitiesandDebt" xlink:type="simple" xlink:href="xyl-20200331.xsd#CreditFacilitiesandDebt"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CreditFacilitiesandDebt" xlink:type="extended" id="ie5c244a1c99f4e598b6b78fea67d65cf_CreditFacilitiesandDebt"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/CreditFacilitiesandDebtTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#CreditFacilitiesandDebtTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CreditFacilitiesandDebtTables" xlink:type="extended" id="i7677c278939f4d9cbc462a9c2686e322_CreditFacilitiesandDebtTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/CreditFacilitiesandDebtSummaryofDebtOutstandingDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#CreditFacilitiesandDebtSummaryofDebtOutstandingDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CreditFacilitiesandDebtSummaryofDebtOutstandingDetails" xlink:type="extended" id="ib75e2ded85d34ac4bad86f1d2ffb5578_CreditFacilitiesandDebtSummaryofDebtOutstandingDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_63a7e8d0-0d75-4fe6-9661-c77ff798b573" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_0562dd71-c2bb-4fdf-b6bd-0744ac8062bf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_63a7e8d0-0d75-4fe6-9661-c77ff798b573" xlink:to="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_0562dd71-c2bb-4fdf-b6bd-0744ac8062bf" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_0479468f-282a-4131-9d4c-9f2e9fa55695" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_0562dd71-c2bb-4fdf-b6bd-0744ac8062bf" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_0479468f-282a-4131-9d4c-9f2e9fa55695" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_d59c0b53-5876-4e42-9559-32639a7c02f2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_0562dd71-c2bb-4fdf-b6bd-0744ac8062bf" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_d59c0b53-5876-4e42-9559-32639a7c02f2" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_7d45353e-a9ab-4bdb-a727-d8a8c0f581b7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_0562dd71-c2bb-4fdf-b6bd-0744ac8062bf" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_7d45353e-a9ab-4bdb-a727-d8a8c0f581b7" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtCurrent_dcbf729b-8adc-4a2d-b8e0-f463c935689d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtCurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_0562dd71-c2bb-4fdf-b6bd-0744ac8062bf" xlink:to="loc_us-gaap_DebtCurrent_dcbf729b-8adc-4a2d-b8e0-f463c935689d" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_d6634838-e5f7-4585-9802-812bacd657f0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByCurrentAndNoncurrentAbstract_0562dd71-c2bb-4fdf-b6bd-0744ac8062bf" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_d6634838-e5f7-4585-9802-812bacd657f0" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_68668da2-4292-4f78-ae76-d7365e5f5eb5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_63a7e8d0-0d75-4fe6-9661-c77ff798b573" xlink:to="loc_us-gaap_DebtInstrumentTable_68668da2-4292-4f78-ae76-d7365e5f5eb5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_70364356-2d61-4263-9ecd-4db83d76a9e5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_68668da2-4292-4f78-ae76-d7365e5f5eb5" xlink:to="loc_us-gaap_DebtInstrumentAxis_70364356-2d61-4263-9ecd-4db83d76a9e5" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_70364356-2d61-4263-9ecd-4db83d76a9e5_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_70364356-2d61-4263-9ecd-4db83d76a9e5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_70364356-2d61-4263-9ecd-4db83d76a9e5_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_3bcbbb59-1dd0-4580-8f94-2826d3d12e7f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_70364356-2d61-4263-9ecd-4db83d76a9e5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_3bcbbb59-1dd0-4580-8f94-2826d3d12e7f" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandAndTwentyOneMember_608a572d-f394-42e5-b789-3ac9b7cd9673" xlink:href="xyl-20200331.xsd#xyl_SeniorNotesDueTwoThousandAndTwentyOneMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_3bcbbb59-1dd0-4580-8f94-2826d3d12e7f" xlink:to="loc_xyl_SeniorNotesDueTwoThousandAndTwentyOneMember_608a572d-f394-42e5-b789-3ac9b7cd9673" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_bb59d551-d37b-416b-b455-44958c4dfaff" xlink:href="xyl-20200331.xsd#xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_3bcbbb59-1dd0-4580-8f94-2826d3d12e7f" xlink:to="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_bb59d551-d37b-416b-b455-44958c4dfaff" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandTwentySixMember_fb81954e-049a-4b45-92e4-f84d684072be" xlink:href="xyl-20200331.xsd#xyl_SeniorNotesDueTwoThousandTwentySixMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_3bcbbb59-1dd0-4580-8f94-2826d3d12e7f" xlink:to="loc_xyl_SeniorNotesDueTwoThousandTwentySixMember_fb81954e-049a-4b45-92e4-f84d684072be" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandFortySixMember_fff056a6-1967-45e9-8f33-0891404ada05" xlink:href="xyl-20200331.xsd#xyl_SeniorNotesDueTwoThousandFortySixMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_3bcbbb59-1dd0-4580-8f94-2826d3d12e7f" xlink:to="loc_xyl_SeniorNotesDueTwoThousandFortySixMember_fff056a6-1967-45e9-8f33-0891404ada05" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_0121baab-3b69-4f3c-8c27-68da0f86f8bf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommercialPaperMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_3bcbbb59-1dd0-4580-8f94-2826d3d12e7f" xlink:to="loc_us-gaap_CommercialPaperMember_0121baab-3b69-4f3c-8c27-68da0f86f8bf" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_LongTermDebtOtherMember_c3d7537d-991e-4785-aeb3-89c3b1700560" xlink:href="xyl-20200331.xsd#xyl_LongTermDebtOtherMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_3bcbbb59-1dd0-4580-8f94-2826d3d12e7f" xlink:to="loc_xyl_LongTermDebtOtherMember_c3d7537d-991e-4785-aeb3-89c3b1700560" xlink:type="arc" order="5"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/CreditFacilitiesandDebtTextualsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#CreditFacilitiesandDebtTextualsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CreditFacilitiesandDebtTextualsDetails" xlink:type="extended" id="ic054d0e5c4394e21b4e13890a4380de1_CreditFacilitiesandDebtTextualsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_bf972735-c5e9-48b9-9088-314d73116575" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_LongTermDebtFairValue_bf972735-c5e9-48b9-9088-314d73116575" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_3cc7338c-4359-4e3c-a974-68458fc33727" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_3cc7338c-4359-4e3c-a974-68458fc33727" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_9b275327-1af2-449e-9af9-15ff22c5cdca" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_9b275327-1af2-449e-9af9-15ff22c5cdca" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_ebb24119-2fec-4b8f-a7e3-9827aac3fe47" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_ebb24119-2fec-4b8f-a7e3-9827aac3fe47" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaper_1d98ef31-1031-4986-b362-4fa739ef7acf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommercialPaper"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_CommercialPaper_1d98ef31-1031-4986-b362-4fa739ef7acf" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_CommercialPaperWeightedAverageInterestRateReceivable_f61aa561-3a2b-45cb-b44a-dec5a4c8db65" xlink:href="xyl-20200331.xsd#xyl_CommercialPaperWeightedAverageInterestRateReceivable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_xyl_CommercialPaperWeightedAverageInterestRateReceivable_f61aa561-3a2b-45cb-b44a-dec5a4c8db65" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_RedemptionPricePercentage_794adb5d-199a-49b0-ae08-d7bda53ecca4" xlink:href="xyl-20200331.xsd#xyl_RedemptionPricePercentage"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_xyl_RedemptionPricePercentage_794adb5d-199a-49b0-ae08-d7bda53ecca4" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_b82a6d75-b9f4-48bf-95ed-84e1f20f1683" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTerm"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_DebtInstrumentTerm_b82a6d75-b9f4-48bf-95ed-84e1f20f1683" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_d18587f5-b987-461b-b1ec-26c0e6c594f1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_d18587f5-b987-461b-b1ec-26c0e6c594f1" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacity_60105897-179c-4028-8919-2dac2d277315" xlink:href="xyl-20200331.xsd#xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacity"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacity_60105897-179c-4028-8919-2dac2d277315" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacityTotal_bfdd8190-15dc-4e2c-9c18-138e13347736" xlink:href="xyl-20200331.xsd#xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacityTotal"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_xyl_LineofCreditFacilityIncreasesinMaximumBorrowingCapacityTotal_bfdd8190-15dc-4e2c-9c18-138e13347736" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_04183553-31eb-4233-a40e-546ebf0501ad" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfUnsecuredDebt"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_04183553-31eb-4233-a40e-546ebf0501ad" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_e0516658-2abe-4e57-8567-bc1ff05fec7d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_e0516658-2abe-4e57-8567-bc1ff05fec7d" xlink:type="arc" order="12"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_61873a99-91c5-40b0-9dfa-6475909883be" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermBorrowings"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_ShortTermBorrowings_61873a99-91c5-40b0-9dfa-6475909883be" xlink:type="arc" order="13"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_9ff27282-1b57-4742-95eb-3fcf09f47eb1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_9ff27282-1b57-4742-95eb-3fcf09f47eb1" xlink:type="arc" order="14"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_82bd49d8-bec5-40d4-ba61-374049f1936e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bc8183f3-3476-4cf1-a480-d68b9c2baadf" xlink:to="loc_us-gaap_DebtInstrumentTable_82bd49d8-bec5-40d4-ba61-374049f1936e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_c10cbc43-5301-449a-8d21-3f65b2216b69" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_82bd49d8-bec5-40d4-ba61-374049f1936e" xlink:to="loc_us-gaap_DebtInstrumentAxis_c10cbc43-5301-449a-8d21-3f65b2216b69" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c10cbc43-5301-449a-8d21-3f65b2216b69_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_c10cbc43-5301-449a-8d21-3f65b2216b69" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c10cbc43-5301-449a-8d21-3f65b2216b69_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_c10cbc43-5301-449a-8d21-3f65b2216b69" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandAndTwentyOneMember_296da89e-14cd-49a6-8cb0-c71a26245e99" xlink:href="xyl-20200331.xsd#xyl_SeniorNotesDueTwoThousandAndTwentyOneMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_xyl_SeniorNotesDueTwoThousandAndTwentyOneMember_296da89e-14cd-49a6-8cb0-c71a26245e99" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_7e3811f8-93f7-47bb-8c27-b7447be6cfc0" xlink:href="xyl-20200331.xsd#xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_xyl_SeniorNotesDueTwoThousandAndTwentyThreeMember_7e3811f8-93f7-47bb-8c27-b7447be6cfc0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandTwentySixMember_d9e16b27-c73c-41b7-ae64-62167a7e88c9" xlink:href="xyl-20200331.xsd#xyl_SeniorNotesDueTwoThousandTwentySixMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_xyl_SeniorNotesDueTwoThousandTwentySixMember_d9e16b27-c73c-41b7-ae64-62167a7e88c9" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SeniorNotesDueTwoThousandFortySixMember_669d0d33-3efe-4a85-b120-effdf6c79583" xlink:href="xyl-20200331.xsd#xyl_SeniorNotesDueTwoThousandFortySixMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_xyl_SeniorNotesDueTwoThousandFortySixMember_669d0d33-3efe-4a85-b120-effdf6c79583" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_FiveYearRevolvingCreditFacility2015Member_77c15ef4-b83d-4be0-8541-5f2576366a8b" xlink:href="xyl-20200331.xsd#xyl_FiveYearRevolvingCreditFacility2015Member"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_xyl_FiveYearRevolvingCreditFacility2015Member_77c15ef4-b83d-4be0-8541-5f2576366a8b" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_FiveYearRevolvingCreditFacility2019Member_eea1c844-9b39-4dd9-9023-e257f818f8c4" xlink:href="xyl-20200331.xsd#xyl_FiveYearRevolvingCreditFacility2019Member"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_xyl_FiveYearRevolvingCreditFacility2019Member_eea1c844-9b39-4dd9-9023-e257f818f8c4" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_USDollarCommercialPaperProgramMember_bc78626f-dfa1-4245-be6b-18ad58880dc6" xlink:href="xyl-20200331.xsd#xyl_USDollarCommercialPaperProgramMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_xyl_USDollarCommercialPaperProgramMember_bc78626f-dfa1-4245-be6b-18ad58880dc6" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_c3083a61-cce1-408b-b7dd-290f77260461" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommercialPaperMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_us-gaap_CommercialPaperMember_c3083a61-cce1-408b-b7dd-290f77260461" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_EuroCommercialPaperProgramMember_937730df-0355-40d9-abd8-b37c80276ac1" xlink:href="xyl-20200331.xsd#xyl_EuroCommercialPaperProgramMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_xyl_EuroCommercialPaperProgramMember_937730df-0355-40d9-abd8-b37c80276ac1" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_UncommittedShortTermFacilityMember_6444f73c-cc6c-4d31-835f-7e0a00c9c9be" xlink:href="xyl-20200331.xsd#xyl_UncommittedShortTermFacilityMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_xyl_UncommittedShortTermFacilityMember_6444f73c-cc6c-4d31-835f-7e0a00c9c9be" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_UncommittedShortTermFacilityBGLBNPParibasBankMember_60c40990-2312-49eb-a569-70b68519dd80" xlink:href="xyl-20200331.xsd#xyl_UncommittedShortTermFacilityBGLBNPParibasBankMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_xyl_UncommittedShortTermFacilityBGLBNPParibasBankMember_60c40990-2312-49eb-a569-70b68519dd80" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_TermLoanFacilityMember_fe81d285-b500-4760-8aac-9367353b9ea1" xlink:href="xyl-20200331.xsd#xyl_TermLoanFacilityMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5be7de8e-5b6b-4d88-ae38-49730998a1ad" xlink:to="loc_xyl_TermLoanFacilityMember_fe81d285-b500-4760-8aac-9367353b9ea1" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_e3c901fc-14bd-42ff-b21b-6bb6b4d49efd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_82bd49d8-bec5-40d4-ba61-374049f1936e" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_e3c901fc-14bd-42ff-b21b-6bb6b4d49efd" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_e3c901fc-14bd-42ff-b21b-6bb6b4d49efd_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_e3c901fc-14bd-42ff-b21b-6bb6b4d49efd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_e3c901fc-14bd-42ff-b21b-6bb6b4d49efd_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_4bb76fc4-812c-4550-ba39-4af6b9ffe8f3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_e3c901fc-14bd-42ff-b21b-6bb6b4d49efd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_4bb76fc4-812c-4550-ba39-4af6b9ffe8f3" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_2750d65f-44fc-46b7-8609-cf72d246e23b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeniorNotesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_4bb76fc4-812c-4550-ba39-4af6b9ffe8f3" xlink:to="loc_us-gaap_SeniorNotesMember_2750d65f-44fc-46b7-8609-cf72d246e23b" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_d28c2c9a-8470-44f6-8e51-30291174c29d" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_82bd49d8-bec5-40d4-ba61-374049f1936e" xlink:to="loc_srt_ConsolidatedEntitiesAxis_d28c2c9a-8470-44f6-8e51-30291174c29d" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_d28c2c9a-8470-44f6-8e51-30291174c29d_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_d28c2c9a-8470-44f6-8e51-30291174c29d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_d28c2c9a-8470-44f6-8e51-30291174c29d_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_f3250d04-828d-4d86-b0a8-a2ccb3f82fad" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_d28c2c9a-8470-44f6-8e51-30291174c29d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_f3250d04-828d-4d86-b0a8-a2ccb3f82fad" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_SubsidiariesMember_dec70d0e-dea4-4901-8d20-42414cfd1c30" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SubsidiariesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_f3250d04-828d-4d86-b0a8-a2ccb3f82fad" xlink:to="loc_srt_SubsidiariesMember_dec70d0e-dea4-4901-8d20-42414cfd1c30" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_2c875602-c0c0-4883-b68a-c3d161028196" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_82bd49d8-bec5-40d4-ba61-374049f1936e" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_2c875602-c0c0-4883-b68a-c3d161028196" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_2c875602-c0c0-4883-b68a-c3d161028196_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_2c875602-c0c0-4883-b68a-c3d161028196" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_2c875602-c0c0-4883-b68a-c3d161028196_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_44a98e82-1b70-42a6-afd3-6bcb0408b8cf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_2c875602-c0c0-4883-b68a-c3d161028196" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_44a98e82-1b70-42a6-afd3-6bcb0408b8cf" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_497dc224-d48f-415d-8f54-82e69ec0ab9e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_44a98e82-1b70-42a6-afd3-6bcb0408b8cf" xlink:to="loc_us-gaap_SubsequentEventMember_497dc224-d48f-415d-8f54-82e69ec0ab9e" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_8989a63f-9ea7-45bd-9ba6-c5374bd64128" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_82bd49d8-bec5-40d4-ba61-374049f1936e" xlink:to="loc_us-gaap_VariableRateAxis_8989a63f-9ea7-45bd-9ba6-c5374bd64128" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_8989a63f-9ea7-45bd-9ba6-c5374bd64128_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_8989a63f-9ea7-45bd-9ba6-c5374bd64128" xlink:to="loc_us-gaap_VariableRateDomain_8989a63f-9ea7-45bd-9ba6-c5374bd64128_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_a79444de-80eb-4b3b-a312-74ca1eca9c7e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_8989a63f-9ea7-45bd-9ba6-c5374bd64128" xlink:to="loc_us-gaap_VariableRateDomain_a79444de-80eb-4b3b-a312-74ca1eca9c7e" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_AdjustedLIBORMember_f66aaaf1-c8a0-4936-b477-2502d5427e04" xlink:href="xyl-20200331.xsd#xyl_AdjustedLIBORMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_a79444de-80eb-4b3b-a312-74ca1eca9c7e" xlink:to="loc_xyl_AdjustedLIBORMember_f66aaaf1-c8a0-4936-b477-2502d5427e04" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_598eef06-3f6a-4583-8a8d-fcd279544a20" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_82bd49d8-bec5-40d4-ba61-374049f1936e" xlink:to="loc_us-gaap_CreditFacilityAxis_598eef06-3f6a-4583-8a8d-fcd279544a20" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_598eef06-3f6a-4583-8a8d-fcd279544a20_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_598eef06-3f6a-4583-8a8d-fcd279544a20" xlink:to="loc_us-gaap_CreditFacilityDomain_598eef06-3f6a-4583-8a8d-fcd279544a20_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_bb7e79cf-206f-450d-948c-b052fa7b9770" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_598eef06-3f6a-4583-8a8d-fcd279544a20" xlink:to="loc_us-gaap_CreditFacilityDomain_bb7e79cf-206f-450d-948c-b052fa7b9770" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_13a3ad85-3184-45ae-af1d-1ef213605a99" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_bb7e79cf-206f-450d-948c-b052fa7b9770" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_13a3ad85-3184-45ae-af1d-1ef213605a99" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/PostretirementBenefitPlans" xlink:type="simple" xlink:href="xyl-20200331.xsd#PostretirementBenefitPlans"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/PostretirementBenefitPlans" xlink:type="extended" id="i1aff6c213df345c79ab22d8bb6e4a786_PostretirementBenefitPlans"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/PostretirementBenefitPlansTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#PostretirementBenefitPlansTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/PostretirementBenefitPlansTables" xlink:type="extended" id="i4662f1297fe142ada75aa9459d55f2c3_PostretirementBenefitPlansTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/PostretirementBenefitPlansSummaryofNetPeriodicBenefitCostDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#PostretirementBenefitPlansSummaryofNetPeriodicBenefitCostDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/PostretirementBenefitPlansSummaryofNetPeriodicBenefitCostDetails" xlink:type="extended" id="i4576d0ba73e74910a0ea77a4d544f5fc_PostretirementBenefitPlansSummaryofNetPeriodicBenefitCostDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c0f957be-9564-47bc-b8ff-43c7b311c401" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3f7facee-7ba1-4352-828a-43c3db9756e4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c0f957be-9564-47bc-b8ff-43c7b311c401" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3f7facee-7ba1-4352-828a-43c3db9756e4" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_10494ffd-0eda-4177-8b60-7af2fd0b6529" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3f7facee-7ba1-4352-828a-43c3db9756e4" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_10494ffd-0eda-4177-8b60-7af2fd0b6529" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_4ec37909-02c2-487e-91d3-58cf21493b4e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_10494ffd-0eda-4177-8b60-7af2fd0b6529" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_4ec37909-02c2-487e-91d3-58cf21493b4e" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_186f578e-a563-4a3a-b826-802b957b32eb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_10494ffd-0eda-4177-8b60-7af2fd0b6529" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_186f578e-a563-4a3a-b826-802b957b32eb" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_874a5374-c9fd-433f-8111-3e6de7bfe151" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_10494ffd-0eda-4177-8b60-7af2fd0b6529" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_874a5374-c9fd-433f-8111-3e6de7bfe151" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_64230d89-f10b-46fb-bc8e-bd38a9cf4a75" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_10494ffd-0eda-4177-8b60-7af2fd0b6529" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_64230d89-f10b-46fb-bc8e-bd38a9cf4a75" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_d4005b4a-0605-4c4f-a133-0cf69dc6e990" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_10494ffd-0eda-4177-8b60-7af2fd0b6529" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_d4005b4a-0605-4c4f-a133-0cf69dc6e990" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_fab494ca-7145-400f-b3f4-472843fae5f2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c0f957be-9564-47bc-b8ff-43c7b311c401" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_fab494ca-7145-400f-b3f4-472843fae5f2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_c530d05e-4669-4bfd-b389-0dffa2af785f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_fab494ca-7145-400f-b3f4-472843fae5f2" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_c530d05e-4669-4bfd-b389-0dffa2af785f" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_c530d05e-4669-4bfd-b389-0dffa2af785f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_c530d05e-4669-4bfd-b389-0dffa2af785f" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_c530d05e-4669-4bfd-b389-0dffa2af785f_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_76083946-c918-46c7-a472-17ccb9fa5f11" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_c530d05e-4669-4bfd-b389-0dffa2af785f" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_76083946-c918-46c7-a472-17ccb9fa5f11" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticPlanMember_4780ead5-b242-4e3b-b2e3-c78140b5c2bb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DomesticPlanMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_76083946-c918-46c7-a472-17ccb9fa5f11" xlink:to="loc_us-gaap_DomesticPlanMember_4780ead5-b242-4e3b-b2e3-c78140b5c2bb" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignPlanMember_b071e7ee-b6ea-4600-924d-836ae22e4d90" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignPlanMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_76083946-c918-46c7-a472-17ccb9fa5f11" xlink:to="loc_us-gaap_ForeignPlanMember_b071e7ee-b6ea-4600-924d-836ae22e4d90" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/PostretirementBenefitPlansTextualsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#PostretirementBenefitPlansTextualsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/PostretirementBenefitPlansTextualsDetails" xlink:type="extended" id="ibb87269ae9554098895770094e222ede_PostretirementBenefitPlansTextualsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_2f273506-d230-4616-a69a-f9b56ae05e20" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitExpense_166b85b5-470d-4815-83a6-a992248c4ce1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherPostretirementBenefitExpense"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_2f273506-d230-4616-a69a-f9b56ae05e20" xlink:to="loc_us-gaap_OtherPostretirementBenefitExpense_166b85b5-470d-4815-83a6-a992248c4ce1" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_851f0310-99cd-407a-a8d1-e8232902d417" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_2f273506-d230-4616-a69a-f9b56ae05e20" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_851f0310-99cd-407a-a8d1-e8232902d417" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_27366ceb-d4dd-4ffc-8704-eaded42ab07f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_2f273506-d230-4616-a69a-f9b56ae05e20" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_27366ceb-d4dd-4ffc-8704-eaded42ab07f" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_204540b9-3f77-4673-b98e-f89f807101da" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_2f273506-d230-4616-a69a-f9b56ae05e20" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_204540b9-3f77-4673-b98e-f89f807101da" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_2a77282a-faa7-4117-80c5-11190be50ba3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanSettlementsPlanAssets"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_2f273506-d230-4616-a69a-f9b56ae05e20" xlink:to="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_2a77282a-faa7-4117-80c5-11190be50ba3" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_24375584-927e-4fee-8b08-9ce1756b8679" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_2f273506-d230-4616-a69a-f9b56ae05e20" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_24375584-927e-4fee-8b08-9ce1756b8679" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsTransferredToFromPlan_676b68ff-4fc9-41c7-98e3-87fdb7800ba7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsTransferredToFromPlan"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_2f273506-d230-4616-a69a-f9b56ae05e20" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsTransferredToFromPlan_676b68ff-4fc9-41c7-98e3-87fdb7800ba7" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_2fbe737a-d17c-42aa-bd1b-270ef41bb23b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_2f273506-d230-4616-a69a-f9b56ae05e20" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_2fbe737a-d17c-42aa-bd1b-270ef41bb23b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_4286e3b3-24bb-401d-90df-64d0d00ae822" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_2fbe737a-d17c-42aa-bd1b-270ef41bb23b" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_4286e3b3-24bb-401d-90df-64d0d00ae822" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_4286e3b3-24bb-401d-90df-64d0d00ae822_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_4286e3b3-24bb-401d-90df-64d0d00ae822" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_4286e3b3-24bb-401d-90df-64d0d00ae822_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_344f2993-40cb-43c0-b422-16a211427316" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_4286e3b3-24bb-401d-90df-64d0d00ae822" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_344f2993-40cb-43c0-b422-16a211427316" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignPlanMember_a835f788-3291-42e7-86b9-8fac3975ab7b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignPlanMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_344f2993-40cb-43c0-b422-16a211427316" xlink:to="loc_us-gaap_ForeignPlanMember_a835f788-3291-42e7-86b9-8fac3975ab7b" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_3344d90b-58d8-4c75-a4f5-55e3d38770ff" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_2fbe737a-d17c-42aa-bd1b-270ef41bb23b" xlink:to="loc_srt_RangeAxis_3344d90b-58d8-4c75-a4f5-55e3d38770ff" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_3344d90b-58d8-4c75-a4f5-55e3d38770ff_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_3344d90b-58d8-4c75-a4f5-55e3d38770ff" xlink:to="loc_srt_RangeMember_3344d90b-58d8-4c75-a4f5-55e3d38770ff_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_9b8fc74e-a61e-4274-9477-a83d9b45b7d7" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_3344d90b-58d8-4c75-a4f5-55e3d38770ff" xlink:to="loc_srt_RangeMember_9b8fc74e-a61e-4274-9477-a83d9b45b7d7" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_4d7c79b9-9bde-47de-864e-f650bdfdf7f8" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_9b8fc74e-a61e-4274-9477-a83d9b45b7d7" xlink:to="loc_srt_MinimumMember_4d7c79b9-9bde-47de-864e-f650bdfdf7f8" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_74114087-3a70-4dd2-b409-b2ee54cc0ce5" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_9b8fc74e-a61e-4274-9477-a83d9b45b7d7" xlink:to="loc_srt_MaximumMember_74114087-3a70-4dd2-b409-b2ee54cc0ce5" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/Equity" xlink:type="simple" xlink:href="xyl-20200331.xsd#Equity"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/Equity" xlink:type="extended" id="ia5890df335ac4b91ba0e0ca91d3f29a3_Equity"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/EquityTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#EquityTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/EquityTables" xlink:type="extended" id="i8d1b057ae37947618d50e93fb94352dd_EquityTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/EquitySummaryofShareholdersEquityDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#EquitySummaryofShareholdersEquityDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/EquitySummaryofShareholdersEquityDetails" xlink:type="extended" id="i29b2b533a5704f39a1d64e15a28b922f_EquitySummaryofShareholdersEquityDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_edec14bd-2a3e-4095-9328-9acb4bd36010" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_7bfcaa2b-85b8-4c39-9efa-06399854263d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_edec14bd-2a3e-4095-9328-9acb4bd36010" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_7bfcaa2b-85b8-4c39-9efa-06399854263d" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_867f28e8-27c7-403e-a9ae-05a3a649d1bf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_edec14bd-2a3e-4095-9328-9acb4bd36010" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_867f28e8-27c7-403e-a9ae-05a3a649d1bf" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_87158d2b-20b0-4ce7-a395-530abc05a9cc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_867f28e8-27c7-403e-a9ae-05a3a649d1bf" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_87158d2b-20b0-4ce7-a395-530abc05a9cc" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_557ed299-94d1-4cdf-8a49-562b9c39c921" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_867f28e8-27c7-403e-a9ae-05a3a649d1bf" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_557ed299-94d1-4cdf-8a49-562b9c39c921" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_c4ca103d-a519-41cd-98c2-658bd55b829c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_867f28e8-27c7-403e-a9ae-05a3a649d1bf" xlink:to="loc_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_c4ca103d-a519-41cd-98c2-658bd55b829c" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_9e09ccc1-d4f5-497d-a46e-0295116b95d4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_867f28e8-27c7-403e-a9ae-05a3a649d1bf" xlink:to="loc_us-gaap_ProfitLoss_9e09ccc1-d4f5-497d-a46e-0295116b95d4" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_70bb19fe-7c0f-483a-b6f6-76adcd1d2c80" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_867f28e8-27c7-403e-a9ae-05a3a649d1bf" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_70bb19fe-7c0f-483a-b6f6-76adcd1d2c80" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCash_81d91bbd-4544-409d-b095-8ac2c9b913c4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsCash"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_867f28e8-27c7-403e-a9ae-05a3a649d1bf" xlink:to="loc_us-gaap_DividendsCash_81d91bbd-4544-409d-b095-8ac2c9b913c4" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_4427a2a5-c961-4e93-8a58-43e7bc31a694" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_867f28e8-27c7-403e-a9ae-05a3a649d1bf" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_4427a2a5-c961-4e93-8a58-43e7bc31a694" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_43378a76-52c2-4dd1-b98c-807d59d0147f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_867f28e8-27c7-403e-a9ae-05a3a649d1bf" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_43378a76-52c2-4dd1-b98c-807d59d0147f" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_a0baab58-c2c5-4e74-9bbd-eb41fa835602" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_ce7f2c4a-86fc-4ccd-badb-0a60e41bc47d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_edec14bd-2a3e-4095-9328-9acb4bd36010" xlink:to="loc_us-gaap_StatementTable_ce7f2c4a-86fc-4ccd-badb-0a60e41bc47d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_e2c83fbb-7593-4f61-885a-fc1026e77397" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_ce7f2c4a-86fc-4ccd-badb-0a60e41bc47d" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_e2c83fbb-7593-4f61-885a-fc1026e77397" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e2c83fbb-7593-4f61-885a-fc1026e77397_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e2c83fbb-7593-4f61-885a-fc1026e77397" xlink:to="loc_us-gaap_EquityComponentDomain_e2c83fbb-7593-4f61-885a-fc1026e77397_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e7447f15-f1d3-4ce3-86af-466ea3b51067" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e2c83fbb-7593-4f61-885a-fc1026e77397" xlink:to="loc_us-gaap_EquityComponentDomain_e7447f15-f1d3-4ce3-86af-466ea3b51067" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_86b4baf7-3342-4d89-8c0a-2e4723d1c12d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e7447f15-f1d3-4ce3-86af-466ea3b51067" xlink:to="loc_us-gaap_CommonStockMember_86b4baf7-3342-4d89-8c0a-2e4723d1c12d" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_676877ff-2077-4045-ac8b-b06b2196cdb1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e7447f15-f1d3-4ce3-86af-466ea3b51067" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_676877ff-2077-4045-ac8b-b06b2196cdb1" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_3f44d009-c396-43f4-8823-6aa7148a1034" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e7447f15-f1d3-4ce3-86af-466ea3b51067" xlink:to="loc_us-gaap_RetainedEarningsMember_3f44d009-c396-43f4-8823-6aa7148a1034" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_9c0900bb-5f6a-4c77-b422-f9e72ac4e61a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e7447f15-f1d3-4ce3-86af-466ea3b51067" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_9c0900bb-5f6a-4c77-b422-f9e72ac4e61a" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_b4aa0c46-eee5-4a2b-8617-20e28b7ecb8d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e7447f15-f1d3-4ce3-86af-466ea3b51067" xlink:to="loc_us-gaap_TreasuryStockMember_b4aa0c46-eee5-4a2b-8617-20e28b7ecb8d" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_e46bd08f-d42e-485f-8406-5b8a0e8d5c0a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncontrollingInterestMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e7447f15-f1d3-4ce3-86af-466ea3b51067" xlink:to="loc_us-gaap_NoncontrollingInterestMember_e46bd08f-d42e-485f-8406-5b8a0e8d5c0a" xlink:type="arc" order="5"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlans" xlink:type="simple" xlink:href="xyl-20200331.xsd#ShareBasedCompensationPlans"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlans" xlink:type="extended" id="i2e9ccffb94a44f719add5ddfc62b899f_ShareBasedCompensationPlans"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#ShareBasedCompensationPlansTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansTables" xlink:type="extended" id="i0c0ae36670ec4be580638a36af507085_ShareBasedCompensationPlansTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansTextualsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#ShareBasedCompensationPlansTextualsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansTextualsDetails" xlink:type="extended" id="id38913e0ded54554a989132fa77be2a6_ShareBasedCompensationPlansTextualsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_92af0f70-b4c5-450e-ad8a-4d9ed58f2ffa" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_f2288624-36c5-4d76-831a-0615544eca66" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensation"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_92af0f70-b4c5-450e-ad8a-4d9ed58f2ffa" xlink:to="loc_us-gaap_ShareBasedCompensation_f2288624-36c5-4d76-831a-0615544eca66" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_3391263a-4161-4b6c-8b47-752c1bf0e3d4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_92af0f70-b4c5-450e-ad8a-4d9ed58f2ffa" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_3391263a-4161-4b6c-8b47-752c1bf0e3d4" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_25a5046b-0d96-48ef-b83a-13f92a58be9f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_92af0f70-b4c5-450e-ad8a-4d9ed58f2ffa" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_25a5046b-0d96-48ef-b83a-13f92a58be9f" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_fcb381fe-646d-42a7-bc53-8b325128f34e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_92af0f70-b4c5-450e-ad8a-4d9ed58f2ffa" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_fcb381fe-646d-42a7-bc53-8b325128f34e" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_595cccec-db0d-49a8-b4f9-d01aa59d5942" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_92af0f70-b4c5-450e-ad8a-4d9ed58f2ffa" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_595cccec-db0d-49a8-b4f9-d01aa59d5942" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5a068cce-31d1-4eef-998f-bee94482099a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_92af0f70-b4c5-450e-ad8a-4d9ed58f2ffa" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5a068cce-31d1-4eef-998f-bee94482099a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_56d8386e-5e71-43f5-850e-e598ad27dbb9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5a068cce-31d1-4eef-998f-bee94482099a" xlink:to="loc_us-gaap_AwardTypeAxis_56d8386e-5e71-43f5-850e-e598ad27dbb9" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_56d8386e-5e71-43f5-850e-e598ad27dbb9_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_56d8386e-5e71-43f5-850e-e598ad27dbb9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_56d8386e-5e71-43f5-850e-e598ad27dbb9_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cfc7ea20-484e-4e80-908d-38f5d0b68a19" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_56d8386e-5e71-43f5-850e-e598ad27dbb9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cfc7ea20-484e-4e80-908d-38f5d0b68a19" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_3730ab05-0360-49ec-a5b2-7e38ccf92382" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cfc7ea20-484e-4e80-908d-38f5d0b68a19" xlink:to="loc_us-gaap_EmployeeStockOptionMember_3730ab05-0360-49ec-a5b2-7e38ccf92382" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_00685064-23c1-4b7d-896e-fd4f36ba6d43" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cfc7ea20-484e-4e80-908d-38f5d0b68a19" xlink:to="loc_us-gaap_RestrictedStockMember_00685064-23c1-4b7d-896e-fd4f36ba6d43" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_ece1d8bf-8e5a-48f4-879f-816e4b1cb90d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cfc7ea20-484e-4e80-908d-38f5d0b68a19" xlink:to="loc_us-gaap_PerformanceSharesMember_ece1d8bf-8e5a-48f4-879f-816e4b1cb90d" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofStockOptionsGrantDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#ShareBasedCompensationPlansSummaryofStockOptionsGrantDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofStockOptionsGrantDetails" xlink:type="extended" id="ie5a10f06006f42519645ead1c7627b39_ShareBasedCompensationPlansSummaryofStockOptionsGrantDetails"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansStockOptionFairValueAssumptionsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#ShareBasedCompensationPlansStockOptionFairValueAssumptionsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansStockOptionFairValueAssumptionsDetails" xlink:type="extended" id="ic9622feb4ac146fba05ba8a25867115a_ShareBasedCompensationPlansStockOptionFairValueAssumptionsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3fc9c3f7-2716-4842-969e-840a0e975d6c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_0d4ffc0b-663b-4284-926a-eec4633907be" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3fc9c3f7-2716-4842-969e-840a0e975d6c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_0d4ffc0b-663b-4284-926a-eec4633907be" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_d0051f38-8011-4c29-b797-4e5158db6314" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3fc9c3f7-2716-4842-969e-840a0e975d6c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_d0051f38-8011-4c29-b797-4e5158db6314" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_1bd99712-bf74-4f56-a432-8d380568611f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3fc9c3f7-2716-4842-969e-840a0e975d6c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_1bd99712-bf74-4f56-a432-8d380568611f" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_cbfb4eda-3b35-4072-9746-deeeed4c54ec" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3fc9c3f7-2716-4842-969e-840a0e975d6c" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_cbfb4eda-3b35-4072-9746-deeeed4c54ec" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageFairValue_7d95742b-a699-44ce-bcbc-f4069e967f8b" xlink:href="xyl-20200331.xsd#xyl_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3fc9c3f7-2716-4842-969e-840a0e975d6c" xlink:to="loc_xyl_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageFairValue_7d95742b-a699-44ce-bcbc-f4069e967f8b" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_d0b21ac3-e8a2-4283-9dcf-1da85419dddc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3fc9c3f7-2716-4842-969e-840a0e975d6c" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_d0b21ac3-e8a2-4283-9dcf-1da85419dddc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_2396a12c-5bc8-4b4e-a17d-c4f4801d771e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_d0b21ac3-e8a2-4283-9dcf-1da85419dddc" xlink:to="loc_us-gaap_AwardTypeAxis_2396a12c-5bc8-4b4e-a17d-c4f4801d771e" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2396a12c-5bc8-4b4e-a17d-c4f4801d771e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_2396a12c-5bc8-4b4e-a17d-c4f4801d771e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2396a12c-5bc8-4b4e-a17d-c4f4801d771e_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1576167d-459c-4720-acfd-f29dbcc59e87" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_2396a12c-5bc8-4b4e-a17d-c4f4801d771e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1576167d-459c-4720-acfd-f29dbcc59e87" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_b1e6f127-22fd-4a5b-9254-1ee2f27c383b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1576167d-459c-4720-acfd-f29dbcc59e87" xlink:to="loc_us-gaap_EmployeeStockOptionMember_b1e6f127-22fd-4a5b-9254-1ee2f27c383b" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofRestrictedStockUnitGrantsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#ShareBasedCompensationPlansSummaryofRestrictedStockUnitGrantsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofRestrictedStockUnitGrantsDetails" xlink:type="extended" id="ifc3ce99885014565ab89f611a7fe6776_ShareBasedCompensationPlansSummaryofRestrictedStockUnitGrantsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_40d93e93-6f29-45fd-82de-e6b371bffab7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7c0f7d8d-e785-49be-b834-8390187e0f51" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_40d93e93-6f29-45fd-82de-e6b371bffab7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7c0f7d8d-e785-49be-b834-8390187e0f51" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_355a49b6-e5c1-4db3-99b5-183c161d03a5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7c0f7d8d-e785-49be-b834-8390187e0f51" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_355a49b6-e5c1-4db3-99b5-183c161d03a5" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_b1c250ce-976f-4af4-865e-e7e3e706df93" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7c0f7d8d-e785-49be-b834-8390187e0f51" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_b1c250ce-976f-4af4-865e-e7e3e706df93" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_808d8ab6-0263-499e-8a2f-af4ffde4146a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7c0f7d8d-e785-49be-b834-8390187e0f51" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_808d8ab6-0263-499e-8a2f-af4ffde4146a" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_62182ead-aa44-4d94-9fa4-1bfdff0370a6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_7c0f7d8d-e785-49be-b834-8390187e0f51" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_62182ead-aa44-4d94-9fa4-1bfdff0370a6" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_5c718f94-09b0-41fd-aa73-7f1fcc5f9362" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1feb12c1-1449-4ddc-9492-2310790b91cb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_40d93e93-6f29-45fd-82de-e6b371bffab7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1feb12c1-1449-4ddc-9492-2310790b91cb" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_a338f200-91a7-4d7c-a648-359ef28116d5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1feb12c1-1449-4ddc-9492-2310790b91cb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_a338f200-91a7-4d7c-a648-359ef28116d5" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_1af410b7-abde-4b49-9e56-ae03b527b3b7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1feb12c1-1449-4ddc-9492-2310790b91cb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_1af410b7-abde-4b49-9e56-ae03b527b3b7" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_185d53a3-d009-42e1-9a8b-9c8fae7de80b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1feb12c1-1449-4ddc-9492-2310790b91cb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_185d53a3-d009-42e1-9a8b-9c8fae7de80b" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_dbf562b8-b0c7-40be-a5fd-fc3f29a1f6d0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1feb12c1-1449-4ddc-9492-2310790b91cb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_dbf562b8-b0c7-40be-a5fd-fc3f29a1f6d0" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_7d55c6d7-2f4b-47df-9504-bc971a978cc1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3d2eebf9-8611-4020-9119-b35904b3d447" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_40d93e93-6f29-45fd-82de-e6b371bffab7" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3d2eebf9-8611-4020-9119-b35904b3d447" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_5761e310-b16c-4f00-9fe1-e93188c73c71" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3d2eebf9-8611-4020-9119-b35904b3d447" xlink:to="loc_us-gaap_AwardTypeAxis_5761e310-b16c-4f00-9fe1-e93188c73c71" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5761e310-b16c-4f00-9fe1-e93188c73c71_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_5761e310-b16c-4f00-9fe1-e93188c73c71" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5761e310-b16c-4f00-9fe1-e93188c73c71_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_dbe3e38b-8c67-4447-af3e-7aa20e383aa3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_5761e310-b16c-4f00-9fe1-e93188c73c71" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_dbe3e38b-8c67-4447-af3e-7aa20e383aa3" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_c728fc9b-0b77-4026-bf83-9683a854fcad" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_dbe3e38b-8c67-4447-af3e-7aa20e383aa3" xlink:to="loc_us-gaap_RestrictedStockMember_c728fc9b-0b77-4026-bf83-9683a854fcad" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansShareBasedCompensationPlansSummaryofROICPerformanceShareUnitGrantsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#ShareBasedCompensationPlansShareBasedCompensationPlansSummaryofROICPerformanceShareUnitGrantsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansShareBasedCompensationPlansSummaryofROICPerformanceShareUnitGrantsDetails" xlink:type="extended" id="ic787a040624d49f68d602c4a7829af09_ShareBasedCompensationPlansShareBasedCompensationPlansSummaryofROICPerformanceShareUnitGrantsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_804a21b0-9f60-48f1-94b1-868f0bd3517b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_4d4d0a7d-1559-4aad-98f3-8bdcb68ea6c2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_804a21b0-9f60-48f1-94b1-868f0bd3517b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_4d4d0a7d-1559-4aad-98f3-8bdcb68ea6c2" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_e4b54d67-8be2-4a12-bb6c-77a9e85e2734" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_4d4d0a7d-1559-4aad-98f3-8bdcb68ea6c2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_e4b54d67-8be2-4a12-bb6c-77a9e85e2734" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_a11f5d8a-fee1-4ff6-9520-d397f4e76c91" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_4d4d0a7d-1559-4aad-98f3-8bdcb68ea6c2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_a11f5d8a-fee1-4ff6-9520-d397f4e76c91" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod_a1b79a22-a3b5-4437-91cd-93a6b71b7bb4" xlink:href="xyl-20200331.xsd#xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_4d4d0a7d-1559-4aad-98f3-8bdcb68ea6c2" xlink:to="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod_a1b79a22-a3b5-4437-91cd-93a6b71b7bb4" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_88d3573e-1312-4042-bde6-1d46c11e1fae" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_4d4d0a7d-1559-4aad-98f3-8bdcb68ea6c2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_88d3573e-1312-4042-bde6-1d46c11e1fae" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d053eebb-f3d8-4c01-b2e9-ae61ca1e4791" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_4d4d0a7d-1559-4aad-98f3-8bdcb68ea6c2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d053eebb-f3d8-4c01-b2e9-ae61ca1e4791" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_83147cf1-3f1a-46fd-b7a7-c47b135ffe00" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_83a8fbd7-8471-471c-b9dd-44f9b139250a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_804a21b0-9f60-48f1-94b1-868f0bd3517b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_83a8fbd7-8471-471c-b9dd-44f9b139250a" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_52096f77-b2eb-446a-928d-df522355fc25" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_83a8fbd7-8471-471c-b9dd-44f9b139250a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_52096f77-b2eb-446a-928d-df522355fc25" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_873f966b-f767-4e34-bf1d-8c77507c1c13" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_83a8fbd7-8471-471c-b9dd-44f9b139250a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_873f966b-f767-4e34-bf1d-8c77507c1c13" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue_9c039c13-28b6-44ab-87ca-e147308f7ff4" xlink:href="xyl-20200331.xsd#xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_83a8fbd7-8471-471c-b9dd-44f9b139250a" xlink:to="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue_9c039c13-28b6-44ab-87ca-e147308f7ff4" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_19c6d966-04d7-43d2-a6c4-e5516935dfeb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_83a8fbd7-8471-471c-b9dd-44f9b139250a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_19c6d966-04d7-43d2-a6c4-e5516935dfeb" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_88da2323-3f1f-4a49-b194-aadae2b99b66" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_83a8fbd7-8471-471c-b9dd-44f9b139250a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_88da2323-3f1f-4a49-b194-aadae2b99b66" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_c1d122a7-84cc-4fbe-8dbd-df693747d290" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8bdb4dac-54eb-491c-b41b-30ab64068a9e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_804a21b0-9f60-48f1-94b1-868f0bd3517b" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8bdb4dac-54eb-491c-b41b-30ab64068a9e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_e8e2446a-bad0-4a43-b5ad-c19a26bf0b07" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8bdb4dac-54eb-491c-b41b-30ab64068a9e" xlink:to="loc_us-gaap_PlanNameAxis_e8e2446a-bad0-4a43-b5ad-c19a26bf0b07" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_e8e2446a-bad0-4a43-b5ad-c19a26bf0b07_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_e8e2446a-bad0-4a43-b5ad-c19a26bf0b07" xlink:to="loc_us-gaap_PlanNameDomain_e8e2446a-bad0-4a43-b5ad-c19a26bf0b07_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_0499486b-4228-4dea-8773-41cbca292a91" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_e8e2446a-bad0-4a43-b5ad-c19a26bf0b07" xlink:to="loc_us-gaap_PlanNameDomain_0499486b-4228-4dea-8773-41cbca292a91" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_ReturnonInvestedCapitalPerformanceBasedSharesMember_d92e1739-74d2-48b5-98f0-aa9e5cd43dd6" xlink:href="xyl-20200331.xsd#xyl_ReturnonInvestedCapitalPerformanceBasedSharesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_0499486b-4228-4dea-8773-41cbca292a91" xlink:to="loc_xyl_ReturnonInvestedCapitalPerformanceBasedSharesMember_d92e1739-74d2-48b5-98f0-aa9e5cd43dd6" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_b45b9d76-b62a-485f-ab12-1557d515309d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8bdb4dac-54eb-491c-b41b-30ab64068a9e" xlink:to="loc_us-gaap_AwardTypeAxis_b45b9d76-b62a-485f-ab12-1557d515309d" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b45b9d76-b62a-485f-ab12-1557d515309d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_b45b9d76-b62a-485f-ab12-1557d515309d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b45b9d76-b62a-485f-ab12-1557d515309d_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9f0da2a5-ecc3-4bd5-b22f-9199fddce4b1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_b45b9d76-b62a-485f-ab12-1557d515309d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9f0da2a5-ecc3-4bd5-b22f-9199fddce4b1" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_cc446bba-3d59-4aa5-946e-994d6e4e45dd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9f0da2a5-ecc3-4bd5-b22f-9199fddce4b1" xlink:to="loc_us-gaap_PerformanceSharesMember_cc446bba-3d59-4aa5-946e-994d6e4e45dd" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofPerformanceBasedShareGrantsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#ShareBasedCompensationPlansSummaryofPerformanceBasedShareGrantsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansSummaryofPerformanceBasedShareGrantsDetails" xlink:type="extended" id="i577d43bc08c2415b9746fc2be2067477_ShareBasedCompensationPlansSummaryofPerformanceBasedShareGrantsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a1bae226-b087-4d8a-b4c9-f33ae2c40064" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9934a012-006c-492b-adf5-da3fa6b5d363" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a1bae226-b087-4d8a-b4c9-f33ae2c40064" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9934a012-006c-492b-adf5-da3fa6b5d363" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_01edef4d-b530-4b6e-9b1c-7d61bdfc4538" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9934a012-006c-492b-adf5-da3fa6b5d363" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_01edef4d-b530-4b6e-9b1c-7d61bdfc4538" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_1a9b3432-d930-4743-b4ba-474d52b14efb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9934a012-006c-492b-adf5-da3fa6b5d363" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_1a9b3432-d930-4743-b4ba-474d52b14efb" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod_ec490a18-561e-489a-8ac4-be918afd2fca" xlink:href="xyl-20200331.xsd#xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9934a012-006c-492b-adf5-da3fa6b5d363" xlink:to="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod_ec490a18-561e-489a-8ac4-be918afd2fca" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_7acf5ab4-4bf1-4266-bfe2-b2a91020fac0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9934a012-006c-492b-adf5-da3fa6b5d363" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_7acf5ab4-4bf1-4266-bfe2-b2a91020fac0" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_f7f4c532-674f-4496-b2ec-001b8f6956c4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_9934a012-006c-492b-adf5-da3fa6b5d363" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_f7f4c532-674f-4496-b2ec-001b8f6956c4" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_1c44d9bb-4680-4889-9eec-db85cd67266e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_226c9d0a-3473-47c4-b1e8-9fa47c7a7305" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a1bae226-b087-4d8a-b4c9-f33ae2c40064" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_226c9d0a-3473-47c4-b1e8-9fa47c7a7305" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_1d1be637-4cd7-4e4c-ac23-bdfdad030fc2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_226c9d0a-3473-47c4-b1e8-9fa47c7a7305" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_1d1be637-4cd7-4e4c-ac23-bdfdad030fc2" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_201f65e4-78bf-4945-b1a2-dd10cc9fe1f9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_226c9d0a-3473-47c4-b1e8-9fa47c7a7305" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_201f65e4-78bf-4945-b1a2-dd10cc9fe1f9" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue_79c0336e-f7db-4636-ab73-1da757584103" xlink:href="xyl-20200331.xsd#xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_226c9d0a-3473-47c4-b1e8-9fa47c7a7305" xlink:to="loc_xyl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriodWeightedAverageGrantDateFairValue_79c0336e-f7db-4636-ab73-1da757584103" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_946c0d40-5eae-4e98-a2b6-7d6b3bb52447" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_226c9d0a-3473-47c4-b1e8-9fa47c7a7305" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_946c0d40-5eae-4e98-a2b6-7d6b3bb52447" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_a2708005-98b3-4ea6-8d55-46e58d74f2a9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_226c9d0a-3473-47c4-b1e8-9fa47c7a7305" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_a2708005-98b3-4ea6-8d55-46e58d74f2a9" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_e8ec24d9-392f-4f1d-a82c-d18ac09efb15" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5198ba61-5f8a-47f5-adc4-dace7761a2b9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a1bae226-b087-4d8a-b4c9-f33ae2c40064" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5198ba61-5f8a-47f5-adc4-dace7761a2b9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_b06078c2-703e-4186-a615-1773002922f5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5198ba61-5f8a-47f5-adc4-dace7761a2b9" xlink:to="loc_us-gaap_PlanNameAxis_b06078c2-703e-4186-a615-1773002922f5" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_b06078c2-703e-4186-a615-1773002922f5_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_b06078c2-703e-4186-a615-1773002922f5" xlink:to="loc_us-gaap_PlanNameDomain_b06078c2-703e-4186-a615-1773002922f5_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_12059d43-4c05-4d3e-bcd9-8b7acc07eded" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_b06078c2-703e-4186-a615-1773002922f5" xlink:to="loc_us-gaap_PlanNameDomain_12059d43-4c05-4d3e-bcd9-8b7acc07eded" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_TotalShareholderReturnPerformanceBasedSharesMember_e10f2e35-3831-4cca-9608-3ed3036bcf0c" xlink:href="xyl-20200331.xsd#xyl_TotalShareholderReturnPerformanceBasedSharesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_12059d43-4c05-4d3e-bcd9-8b7acc07eded" xlink:to="loc_xyl_TotalShareholderReturnPerformanceBasedSharesMember_e10f2e35-3831-4cca-9608-3ed3036bcf0c" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_655c9cf1-0658-4c29-a66f-4cf0ad12e043" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5198ba61-5f8a-47f5-adc4-dace7761a2b9" xlink:to="loc_us-gaap_AwardTypeAxis_655c9cf1-0658-4c29-a66f-4cf0ad12e043" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_655c9cf1-0658-4c29-a66f-4cf0ad12e043_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_655c9cf1-0658-4c29-a66f-4cf0ad12e043" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_655c9cf1-0658-4c29-a66f-4cf0ad12e043_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1f76a36e-165d-491f-88e5-ca427694f9cf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_655c9cf1-0658-4c29-a66f-4cf0ad12e043" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1f76a36e-165d-491f-88e5-ca427694f9cf" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_2882c6d1-ab37-44fb-b487-a36a2d20c705" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1f76a36e-165d-491f-88e5-ca427694f9cf" xlink:to="loc_us-gaap_PerformanceSharesMember_2882c6d1-ab37-44fb-b487-a36a2d20c705" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/ShareBasedCompensationPlansTSRPerformanceBasedSharesFairValueAssumptionsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#ShareBasedCompensationPlansTSRPerformanceBasedSharesFairValueAssumptionsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/ShareBasedCompensationPlansTSRPerformanceBasedSharesFairValueAssumptionsDetails" xlink:type="extended" id="i4f3fe94449c64151a6a3fb4e9dd850df_ShareBasedCompensationPlansTSRPerformanceBasedSharesFairValueAssumptionsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10405921-d518-4aca-aa44-a504feeabd36" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d7a45694-300d-44d7-82fb-c8cce4a95fbb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10405921-d518-4aca-aa44-a504feeabd36" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d7a45694-300d-44d7-82fb-c8cce4a95fbb" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_c9e614c6-c89b-4d15-b487-8c757d16c33d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10405921-d518-4aca-aa44-a504feeabd36" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_c9e614c6-c89b-4d15-b487-8c757d16c33d" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_c9e59ca4-0095-47c5-b060-3f5ac8c723c4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10405921-d518-4aca-aa44-a504feeabd36" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_c9e59ca4-0095-47c5-b060-3f5ac8c723c4" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_2697c727-4da0-4dad-895d-221f0645ffbf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10405921-d518-4aca-aa44-a504feeabd36" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_2697c727-4da0-4dad-895d-221f0645ffbf" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_708567a0-a80e-4f79-b2c7-828bf2f093a1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10405921-d518-4aca-aa44-a504feeabd36" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_708567a0-a80e-4f79-b2c7-828bf2f093a1" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_55b51117-b058-4d8e-90a9-bb85acc9ea0c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_10405921-d518-4aca-aa44-a504feeabd36" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_55b51117-b058-4d8e-90a9-bb85acc9ea0c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_f1d052c3-8add-4b6f-9237-7ce9e9681303" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_55b51117-b058-4d8e-90a9-bb85acc9ea0c" xlink:to="loc_us-gaap_PlanNameAxis_f1d052c3-8add-4b6f-9237-7ce9e9681303" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_f1d052c3-8add-4b6f-9237-7ce9e9681303_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_f1d052c3-8add-4b6f-9237-7ce9e9681303" xlink:to="loc_us-gaap_PlanNameDomain_f1d052c3-8add-4b6f-9237-7ce9e9681303_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_f084c982-2789-4da0-8b1a-632060e0943a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_f1d052c3-8add-4b6f-9237-7ce9e9681303" xlink:to="loc_us-gaap_PlanNameDomain_f084c982-2789-4da0-8b1a-632060e0943a" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_TotalShareholderReturnPerformanceBasedSharesMember_ac2ca9be-ed8d-454a-b38d-6c244d312fc9" xlink:href="xyl-20200331.xsd#xyl_TotalShareholderReturnPerformanceBasedSharesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_f084c982-2789-4da0-8b1a-632060e0943a" xlink:to="loc_xyl_TotalShareholderReturnPerformanceBasedSharesMember_ac2ca9be-ed8d-454a-b38d-6c244d312fc9" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_1053126b-05bd-42bb-af01-0a9622d04309" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_55b51117-b058-4d8e-90a9-bb85acc9ea0c" xlink:to="loc_us-gaap_AwardTypeAxis_1053126b-05bd-42bb-af01-0a9622d04309" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1053126b-05bd-42bb-af01-0a9622d04309_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_1053126b-05bd-42bb-af01-0a9622d04309" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1053126b-05bd-42bb-af01-0a9622d04309_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1f918058-214e-439f-9817-2757ff9c1161" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_1053126b-05bd-42bb-af01-0a9622d04309" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1f918058-214e-439f-9817-2757ff9c1161" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_cc5481eb-c78a-4565-9df7-c484b8158871" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1f918058-214e-439f-9817-2757ff9c1161" xlink:to="loc_us-gaap_PerformanceSharesMember_cc5481eb-c78a-4565-9df7-c484b8158871" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/CapitalStock" xlink:type="simple" xlink:href="xyl-20200331.xsd#CapitalStock"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CapitalStock" xlink:type="extended" id="ib0689af361d74133b6309fb67fda2742_CapitalStock"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/CapitalStockTextualsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#CapitalStockTextualsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CapitalStockTextualsDetails" xlink:type="extended" id="i074ca8f22c464d558755a7f45e9422e6_CapitalStockTextualsDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityClassOfTreasuryStockLineItems_a7a1b8f4-aabf-4bc1-ab41-5d0ffb9bc1c5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityClassOfTreasuryStockLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_3341e22d-db96-40c4-86f1-516421d35e97" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_a7a1b8f4-aabf-4bc1-ab41-5d0ffb9bc1c5" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_3341e22d-db96-40c4-86f1-516421d35e97" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_7b074cfd-9dcc-450a-bfc1-e29efd1a1459" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockSharesAcquired"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_a7a1b8f4-aabf-4bc1-ab41-5d0ffb9bc1c5" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_7b074cfd-9dcc-450a-bfc1-e29efd1a1459" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_27993bde-da54-4c05-aac0-0b67a2efe841" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_a7a1b8f4-aabf-4bc1-ab41-5d0ffb9bc1c5" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_27993bde-da54-4c05-aac0-0b67a2efe841" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_8f6687cf-49ca-4c54-8ec8-fab7623a7be7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_a7a1b8f4-aabf-4bc1-ab41-5d0ffb9bc1c5" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_8f6687cf-49ca-4c54-8ec8-fab7623a7be7" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfTreasuryStockTable_9314b13b-dd0d-49f1-848f-df6d3b901442" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfTreasuryStockTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_a7a1b8f4-aabf-4bc1-ab41-5d0ffb9bc1c5" xlink:to="loc_us-gaap_ClassOfTreasuryStockTable_9314b13b-dd0d-49f1-848f-df6d3b901442" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_c1a05785-c4d3-4012-b0bd-175e9dae31e4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfTreasuryStockTable_9314b13b-dd0d-49f1-848f-df6d3b901442" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_c1a05785-c4d3-4012-b0bd-175e9dae31e4" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_c1a05785-c4d3-4012-b0bd-175e9dae31e4_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_c1a05785-c4d3-4012-b0bd-175e9dae31e4" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_c1a05785-c4d3-4012-b0bd-175e9dae31e4_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_f04bc34c-38b1-4ab3-8611-6a66642153cb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_c1a05785-c4d3-4012-b0bd-175e9dae31e4" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_f04bc34c-38b1-4ab3-8611-6a66642153cb" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_ShareRepurchasePlansMember_625e8ba6-07cd-474c-9c24-04396b4f7be8" xlink:href="xyl-20200331.xsd#xyl_ShareRepurchasePlansMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_f04bc34c-38b1-4ab3-8611-6a66642153cb" xlink:to="loc_xyl_ShareRepurchasePlansMember_625e8ba6-07cd-474c-9c24-04396b4f7be8" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_TwoThousandfifteenStockRepurchaseProgramMember_43010ddd-0c15-4ade-aa60-c1971e95d811" xlink:href="xyl-20200331.xsd#xyl_TwoThousandfifteenStockRepurchaseProgramMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_f04bc34c-38b1-4ab3-8611-6a66642153cb" xlink:to="loc_xyl_TwoThousandfifteenStockRepurchaseProgramMember_43010ddd-0c15-4ade-aa60-c1971e95d811" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_SettlementofEmployeeTaxWithholdingObligationsMember_896794ea-14b9-4183-af70-80b92a21322f" xlink:href="xyl-20200331.xsd#xyl_SettlementofEmployeeTaxWithholdingObligationsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_f04bc34c-38b1-4ab3-8611-6a66642153cb" xlink:to="loc_xyl_SettlementofEmployeeTaxWithholdingObligationsMember_896794ea-14b9-4183-af70-80b92a21322f" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:type="simple" xlink:href="xyl-20200331.xsd#AccumulatedOtherComprehensiveIncomeLoss"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:type="extended" id="i7cf0b8015c27422db7b80a3f73863e06_AccumulatedOtherComprehensiveIncomeLoss"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/AccumulatedOtherComprehensiveIncomeLossTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#AccumulatedOtherComprehensiveIncomeLossTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/AccumulatedOtherComprehensiveIncomeLossTables" xlink:type="extended" id="i4fb488ae919b48668fd0d0eb00355415_AccumulatedOtherComprehensiveIncomeLossTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#AccumulatedOtherComprehensiveIncomeLossDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended" id="i0606b80bf4b74af78a7e634abeb14786_AccumulatedOtherComprehensiveIncomeLossDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_71b8eb44-6d83-410a-b370-421dc13aa6c7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_2707dec6-c84b-4c6a-b162-cab27b4294ff" xlink:href="xyl-20200331.xsd#xyl_AccumulatedOtherComprehensiveIncomeLossRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_71b8eb44-6d83-410a-b370-421dc13aa6c7" xlink:to="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_2707dec6-c84b-4c6a-b162-cab27b4294ff" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_0d5fc35f-9e4d-44d0-a073-cd27c7d9d3fa" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_2707dec6-c84b-4c6a-b162-cab27b4294ff" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_0d5fc35f-9e4d-44d0-a073-cd27c7d9d3fa" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_dd60ca87-2b14-4435-94e7-7dae727c4553" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_2707dec6-c84b-4c6a-b162-cab27b4294ff" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_dd60ca87-2b14-4435-94e7-7dae727c4553" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_ba34d726-e4a7-4dff-81f2-46888b7bf196" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_2707dec6-c84b-4c6a-b162-cab27b4294ff" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_ba34d726-e4a7-4dff-81f2-46888b7bf196" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_06d75aef-4d3d-496b-8218-0bfd35e16e68" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_2707dec6-c84b-4c6a-b162-cab27b4294ff" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_06d75aef-4d3d-496b-8218-0bfd35e16e68" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax_048f01d9-29d4-424a-965d-9feded3de27b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_2707dec6-c84b-4c6a-b162-cab27b4294ff" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax_048f01d9-29d4-424a-965d-9feded3de27b" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_573f458e-a18e-4ca0-b003-d9a7510158a1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_2707dec6-c84b-4c6a-b162-cab27b4294ff" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_573f458e-a18e-4ca0-b003-d9a7510158a1" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_d2bd13c6-5eb9-4112-bc3e-651b17ba2045" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_2707dec6-c84b-4c6a-b162-cab27b4294ff" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_d2bd13c6-5eb9-4112-bc3e-651b17ba2045" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax_f7e254af-5a3a-48b1-9705-a0a08b50f4af" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_xyl_AccumulatedOtherComprehensiveIncomeLossRollForward_2707dec6-c84b-4c6a-b162-cab27b4294ff" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax_f7e254af-5a3a-48b1-9705-a0a08b50f4af" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_d66f4a05-ee4c-4743-8416-c66e19ab281b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_d67d0979-4f89-4cc9-ad08-8259f98a9646" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_71b8eb44-6d83-410a-b370-421dc13aa6c7" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_d67d0979-4f89-4cc9-ad08-8259f98a9646" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_6cd5b35b-b31a-4016-a85f-05030ebb2df9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_d67d0979-4f89-4cc9-ad08-8259f98a9646" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_6cd5b35b-b31a-4016-a85f-05030ebb2df9" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_6cd5b35b-b31a-4016-a85f-05030ebb2df9_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_6cd5b35b-b31a-4016-a85f-05030ebb2df9" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_6cd5b35b-b31a-4016-a85f-05030ebb2df9_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_0d8875b6-8e4d-4949-a3fe-585080f25efd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_6cd5b35b-b31a-4016-a85f-05030ebb2df9" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_0d8875b6-8e4d-4949-a3fe-585080f25efd" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherExpenseMember_2ddf3a77-2ae8-4b34-9ed9-e765a290d633" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherExpenseMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_0d8875b6-8e4d-4949-a3fe-585080f25efd" xlink:to="loc_us-gaap_OtherExpenseMember_2ddf3a77-2ae8-4b34-9ed9-e765a290d633" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesMember_23170f1d-3d64-4759-a072-a194268fb0a4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SalesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_0d8875b6-8e4d-4949-a3fe-585080f25efd" xlink:to="loc_us-gaap_SalesMember_23170f1d-3d64-4759-a072-a194268fb0a4" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_d4d4562e-90e1-4585-af16-4086291401bb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfSalesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_0d8875b6-8e4d-4949-a3fe-585080f25efd" xlink:to="loc_us-gaap_CostOfSalesMember_d4d4562e-90e1-4585-af16-4086291401bb" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_132e5668-0fe9-401e-a0c1-6fb994d0e1e4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_d67d0979-4f89-4cc9-ad08-8259f98a9646" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_132e5668-0fe9-401e-a0c1-6fb994d0e1e4" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_132e5668-0fe9-401e-a0c1-6fb994d0e1e4_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_132e5668-0fe9-401e-a0c1-6fb994d0e1e4" xlink:to="loc_us-gaap_EquityComponentDomain_132e5668-0fe9-401e-a0c1-6fb994d0e1e4_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_ec57ae25-906c-4c11-8797-999edd0529df" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_132e5668-0fe9-401e-a0c1-6fb994d0e1e4" xlink:to="loc_us-gaap_EquityComponentDomain_ec57ae25-906c-4c11-8797-999edd0529df" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_63d0b388-0073-42a1-8198-aa6a067c9d99" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ec57ae25-906c-4c11-8797-999edd0529df" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_63d0b388-0073-42a1-8198-aa6a067c9d99" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_877bcbfe-3331-4697-8b30-5d1b1c8c83f8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ec57ae25-906c-4c11-8797-999edd0529df" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_877bcbfe-3331-4697-8b30-5d1b1c8c83f8" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_e2526b05-8e7c-4f0c-b02c-53618b8f12e9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ec57ae25-906c-4c11-8797-999edd0529df" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_e2526b05-8e7c-4f0c-b02c-53618b8f12e9" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_c8cbe340-b440-4f85-9839-d414723decff" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_ec57ae25-906c-4c11-8797-999edd0529df" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_c8cbe340-b440-4f85-9839-d414723decff" xlink:type="arc" order="3"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/CommitmentsandContingencies" xlink:type="simple" xlink:href="xyl-20200331.xsd#CommitmentsandContingencies"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CommitmentsandContingencies" xlink:type="extended" id="id3d7776cc8924b3ca45b9be82ba8dfa3_CommitmentsandContingencies"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/CommitmentsandContingenciesTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#CommitmentsandContingenciesTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CommitmentsandContingenciesTables" xlink:type="extended" id="iffb64f49bef54a45865e4248e6540c6f_CommitmentsandContingenciesTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/CommitmentsandContingenciesSummaryofWarrantiesDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#CommitmentsandContingenciesSummaryofWarrantiesDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CommitmentsandContingenciesSummaryofWarrantiesDetails" xlink:type="extended" id="i6fe8045bf0c5414794d3625b225d31fb_CommitmentsandContingenciesSummaryofWarrantiesDetails"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/CommitmentsandContingenciesDetailsTextual" xlink:type="simple" xlink:href="xyl-20200331.xsd#CommitmentsandContingenciesDetailsTextual"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/CommitmentsandContingenciesDetailsTextual" xlink:type="extended" id="ia605f1e1d2024d0f90359473e533dbd0_CommitmentsandContingenciesDetailsTextual"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/SegmentInformation" xlink:type="simple" xlink:href="xyl-20200331.xsd#SegmentInformation"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/SegmentInformation" xlink:type="extended" id="i81d4331231574731b92271ee65399d27_SegmentInformation"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/SegmentInformationTables" xlink:type="simple" xlink:href="xyl-20200331.xsd#SegmentInformationTables"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/SegmentInformationTables" xlink:type="extended" id="ic07f7596f986452ab25811ac197cbe51_SegmentInformationTables"/>
<link:roleRef roleURI="http://www.xyleminc.com/role/SegmentInformationSummaryofOperationsbySegmentDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#SegmentInformationSummaryofOperationsbySegmentDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/SegmentInformationSummaryofOperationsbySegmentDetails" xlink:type="extended" id="i3c27ee72d36c4ccf86f5fa2363cf945a_SegmentInformationSummaryofOperationsbySegmentDetails">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_84dc1204-a9e5-4efb-9751-e249f6980e6c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_244f0119-e0e6-463e-ba46-72a50c2e904b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_84dc1204-a9e5-4efb-9751-e249f6980e6c" xlink:to="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_244f0119-e0e6-463e-ba46-72a50c2e904b" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_ed544be7-4783-4f5b-9a88-67b02ab6e055" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Revenues"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_244f0119-e0e6-463e-ba46-72a50c2e904b" xlink:to="loc_us-gaap_Revenues_ed544be7-4783-4f5b-9a88-67b02ab6e055" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_5bd76b4c-02ef-4386-bfb5-6eb809d35b84" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_244f0119-e0e6-463e-ba46-72a50c2e904b" xlink:to="loc_us-gaap_OperatingIncomeLoss_5bd76b4c-02ef-4386-bfb5-6eb809d35b84" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_2e88df2e-9f08-4951-9a78-80502a31a2d5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpense"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_244f0119-e0e6-463e-ba46-72a50c2e904b" xlink:to="loc_us-gaap_InterestExpense_2e88df2e-9f08-4951-9a78-80502a31a2d5" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_bae68dc5-8ff2-4d53-a9da-27266a2341cd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_244f0119-e0e6-463e-ba46-72a50c2e904b" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_bae68dc5-8ff2-4d53-a9da-27266a2341cd" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_657f4de5-c892-4044-920a-84087317babc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_244f0119-e0e6-463e-ba46-72a50c2e904b" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_657f4de5-c892-4044-920a-84087317babc" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_b43a4ed0-152e-41e0-84ae-fbb5604087f7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_244f0119-e0e6-463e-ba46-72a50c2e904b" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_b43a4ed0-152e-41e0-84ae-fbb5604087f7" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_545db1fa-bb78-41b0-8bda-844ebda47aef" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_244f0119-e0e6-463e-ba46-72a50c2e904b" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_545db1fa-bb78-41b0-8bda-844ebda47aef" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_51490b75-57c4-4f57-93c2-d3b407b749a1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_244f0119-e0e6-463e-ba46-72a50c2e904b" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_51490b75-57c4-4f57-93c2-d3b407b749a1" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5c7421e8-496f-49e7-a08d-371c81ab926d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_84dc1204-a9e5-4efb-9751-e249f6980e6c" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5c7421e8-496f-49e7-a08d-371c81ab926d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_b9cc391d-67a4-4c93-b5ce-7b42eaadd449" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5c7421e8-496f-49e7-a08d-371c81ab926d" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_b9cc391d-67a4-4c93-b5ce-7b42eaadd449" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_b9cc391d-67a4-4c93-b5ce-7b42eaadd449_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_b9cc391d-67a4-4c93-b5ce-7b42eaadd449" xlink:to="loc_us-gaap_SegmentDomain_b9cc391d-67a4-4c93-b5ce-7b42eaadd449_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ba15cbf9-24a5-412c-9aa9-b0c943ee82da" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_b9cc391d-67a4-4c93-b5ce-7b42eaadd449" xlink:to="loc_us-gaap_SegmentDomain_ba15cbf9-24a5-412c-9aa9-b0c943ee82da" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_WaterInfrastructureMember_7cca969d-e9f9-49e2-beb4-57a02b08190e" xlink:href="xyl-20200331.xsd#xyl_WaterInfrastructureMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ba15cbf9-24a5-412c-9aa9-b0c943ee82da" xlink:to="loc_xyl_WaterInfrastructureMember_7cca969d-e9f9-49e2-beb4-57a02b08190e" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_AppliedWaterMember_abcd7696-c435-4054-a8ab-b07f433b86f8" xlink:href="xyl-20200331.xsd#xyl_AppliedWaterMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ba15cbf9-24a5-412c-9aa9-b0c943ee82da" xlink:to="loc_xyl_AppliedWaterMember_abcd7696-c435-4054-a8ab-b07f433b86f8" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_MeasurementandControlSolutionsMember_4bf1d02e-9367-412a-945d-39bcaddedc8a" xlink:href="xyl-20200331.xsd#xyl_MeasurementandControlSolutionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ba15cbf9-24a5-412c-9aa9-b0c943ee82da" xlink:to="loc_xyl_MeasurementandControlSolutionsMember_4bf1d02e-9367-412a-945d-39bcaddedc8a" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_xyl_RegionalSellingLocationMemberMember_edfbbdf9-9d7e-4c4e-8f3a-0309709cc260" xlink:href="xyl-20200331.xsd#xyl_RegionalSellingLocationMemberMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ba15cbf9-24a5-412c-9aa9-b0c943ee82da" xlink:to="loc_xyl_RegionalSellingLocationMemberMember_edfbbdf9-9d7e-4c4e-8f3a-0309709cc260" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateAndOtherMember_c5f3a431-0190-432d-8705-3b1489ccebeb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CorporateAndOtherMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ba15cbf9-24a5-412c-9aa9-b0c943ee82da" xlink:to="loc_us-gaap_CorporateAndOtherMember_c5f3a431-0190-432d-8705-3b1489ccebeb" xlink:type="arc" order="4"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.xyleminc.com/role/SegmentInformationTextualsDetails" xlink:type="simple" xlink:href="xyl-20200331.xsd#SegmentInformationTextualsDetails"/>
<link:definitionLink xlink:role="http://www.xyleminc.com/role/SegmentInformationTextualsDetails" xlink:type="extended" id="iafbb1ea39cbf426f9289fa47feec60b6_SegmentInformationTextualsDetails"/>
</link:linkbase>

↑Top
Filing Submission 0001524472-20-000020   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)
Copyright © 2024 Fran Finnegan & Company LLC – All Rights Reserved.
About — Privacy — Redactions — Help — Tue., May 14, 1:51:55.2am ET