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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:4780390a-346c-4f4b-9ed9-49e47a7dc462,g:07eedd32-4e33-492f-bfaa-0b46120dfdda-->
<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.crowncastle.com/role/DocumentandEntityInformation" xlink:type="simple" xlink:href="gsv-20210630.xsd#DocumentandEntityInformation"/>
  <link:definitionLink xlink:role="http://www.crowncastle.com/role/DocumentandEntityInformation" xlink:type="extended" id="i65b5b191ce76416db25dc38580fbe02c_DocumentandEntityInformation">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_b6686a25-2e13-4adc-8155-d0c855b12f5a" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_DocumentType_b6686a25-2e13-4adc-8155-d0c855b12f5a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_f2188acb-5af1-4898-a032-edbc2604ab42" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityAddressAddressLine1_f2188acb-5af1-4898-a032-edbc2604ab42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_b2a6beb7-ee4f-4231-b15a-bc3fead86815" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityAddressAddressLine2_b2a6beb7-ee4f-4231-b15a-bc3fead86815" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_5168964f-4c7f-4a5c-b1e2-70b443b1929e" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityAddressCityOrTown_5168964f-4c7f-4a5c-b1e2-70b443b1929e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_5727e63e-e368-4720-ab02-a8c26e82093c" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityAddressStateOrProvince_5727e63e-e368-4720-ab02-a8c26e82093c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_90306f59-e5b6-4df5-bea4-99a990266c85" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityAddressPostalZipCode_90306f59-e5b6-4df5-bea4-99a990266c85" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_aa1cdfea-53d3-472f-b705-3ac6e0c543fd" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_DocumentQuarterlyReport_aa1cdfea-53d3-472f-b705-3ac6e0c543fd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_175666d2-505f-425f-9259-6d979aa87679" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_DocumentPeriodEndDate_175666d2-505f-425f-9259-6d979aa87679" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_46d4f703-29f4-4c55-8265-30251c546159" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_DocumentTransitionReport_46d4f703-29f4-4c55-8265-30251c546159" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_d1c917a2-50cd-4821-b55a-e64ecc29ba07" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityFileNumber_d1c917a2-50cd-4821-b55a-e64ecc29ba07" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_ad0306f6-7fae-456f-bdad-20782509858d" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityRegistrantName_ad0306f6-7fae-456f-bdad-20782509858d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_20d4e1a3-cd1d-4719-aa08-efadd08b5ff5" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityIncorporationStateCountryCode_20d4e1a3-cd1d-4719-aa08-efadd08b5ff5" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_3d60e00f-cb88-4f04-b44e-8e72556f910c" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityTaxIdentificationNumber_3d60e00f-cb88-4f04-b44e-8e72556f910c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_23db42f3-1ac0-4282-ab6d-b59731bb1a74" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_23db42f3-1ac0-4282-ab6d-b59731bb1a74" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_5479e524-eb69-4b5b-b588-1f79aaaedde8" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_CityAreaCode_5479e524-eb69-4b5b-b588-1f79aaaedde8" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_f718ebb2-8596-4b48-a141-4e89db931d73" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_LocalPhoneNumber_f718ebb2-8596-4b48-a141-4e89db931d73" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_df456e9a-51ad-46ae-8f7f-601c41dcb2d1" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityCurrentReportingStatus_df456e9a-51ad-46ae-8f7f-601c41dcb2d1" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_77529499-53e1-4571-b84a-823c8c3c5dcd" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityInteractiveDataCurrent_77529499-53e1-4571-b84a-823c8c3c5dcd" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_6298aad7-b6a7-4480-8d02-84536486de38" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityFilerCategory_6298aad7-b6a7-4480-8d02-84536486de38" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_8f7e77af-feee-4fe2-8c48-d67a05d54f19" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntitySmallBusiness_8f7e77af-feee-4fe2-8c48-d67a05d54f19" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_36cd18e1-8373-41a2-8252-5ea4f89a3519" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityEmergingGrowthCompany_36cd18e1-8373-41a2-8252-5ea4f89a3519" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_5a7736b8-5de8-43c1-a09b-77ba16e200b0" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityShellCompany_5a7736b8-5de8-43c1-a09b-77ba16e200b0" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_e441f037-d216-452a-97e8-28a342de3820" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_EntityCentralIndexKey_e441f037-d216-452a-97e8-28a342de3820" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_2866a5cc-b525-422e-8f2a-487e90e98ad2" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_CurrentFiscalYearEndDate_2866a5cc-b525-422e-8f2a-487e90e98ad2" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_2b280e6e-8329-46c9-a16f-dbdcb184b14c" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_DocumentFiscalYearFocus_2b280e6e-8329-46c9-a16f-dbdcb184b14c" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_ef8811ce-6227-42bc-b8ad-ebeee25d2b2f" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_DocumentFiscalPeriodFocus_ef8811ce-6227-42bc-b8ad-ebeee25d2b2f" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_a84d7031-7ca2-4aa7-b748-72c828bfbdb3" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_dei_AmendmentFlag_a84d7031-7ca2-4aa7-b748-72c828bfbdb3" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_af98cbc5-fbdd-476e-a940-3d6ffc037ba0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_e5b1308d-a07b-495f-9202-b63ad5438f6c" xlink:to="loc_us-gaap_StatementTable_af98cbc5-fbdd-476e-a940-3d6ffc037ba0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis_cc15a714-1a87-4d83-a8a0-e98544997cad" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_af98cbc5-fbdd-476e-a940-3d6ffc037ba0" xlink:to="loc_dei_EntityAddressesAddressTypeAxis_cc15a714-1a87-4d83-a8a0-e98544997cad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_cc15a714-1a87-4d83-a8a0-e98544997cad_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_cc15a714-1a87-4d83-a8a0-e98544997cad" xlink:to="loc_dei_AddressTypeDomain_cc15a714-1a87-4d83-a8a0-e98544997cad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_d920820b-8b14-40f6-9acd-51daa223d936" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_cc15a714-1a87-4d83-a8a0-e98544997cad" xlink:to="loc_dei_AddressTypeDomain_d920820b-8b14-40f6-9acd-51daa223d936" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_FormerAddressMember_b4004300-19e7-46d8-b4b9-0462fa281ab1" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_FormerAddressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AddressTypeDomain_d920820b-8b14-40f6-9acd-51daa223d936" xlink:to="loc_dei_FormerAddressMember_b4004300-19e7-46d8-b4b9-0462fa281ab1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.crowncastle.com/role/CondensedConsolidatedBalanceSheet" xlink:type="simple" xlink:href="gsv-20210630.xsd#CondensedConsolidatedBalanceSheet"/>
  <link:definitionLink xlink:role="http://www.crowncastle.com/role/CondensedConsolidatedBalanceSheet" xlink:type="extended" id="i8ab1ca329396437c958a86d30069ddc3_CondensedConsolidatedBalanceSheet">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_fac0b536-887b-451e-837e-94ced77e1f31" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_7bcb450c-49c8-478f-90ed-325015102d3c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_fac0b536-887b-451e-837e-94ced77e1f31" xlink:to="loc_us-gaap_StatementOfFinancialPositionAbstract_7bcb450c-49c8-478f-90ed-325015102d3c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_7bcb450c-49c8-478f-90ed-325015102d3c" xlink:to="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_faf19109-75a9-4575-8fd1-3d3044de8a2d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_faf19109-75a9-4575-8fd1-3d3044de8a2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_5d76343b-80f1-48fe-becd-2501a7afb268" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_5d76343b-80f1-48fe-becd-2501a7afb268" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_231798af-351a-4b6a-93a7-f4fc30097fab" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_231798af-351a-4b6a-93a7-f4fc30097fab" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_DeferredSiteRentalReceivablesAndOtherCurrentAssets_3f67c05d-10a4-4a33-910d-5d4bb5cd781c" xlink:href="gsv-20210630.xsd#gsv_DeferredSiteRentalReceivablesAndOtherCurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_gsv_DeferredSiteRentalReceivablesAndOtherCurrentAssets_3f67c05d-10a4-4a33-910d-5d4bb5cd781c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_270b14d9-5e5c-4cc8-9ed6-662e75437f72" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_us-gaap_AssetsCurrent_270b14d9-5e5c-4cc8-9ed6-662e75437f72" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRentReceivablesNetNoncurrent_39ddbe87-4e6c-40aa-b014-d50beab2a2dc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredRentReceivablesNetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_us-gaap_DeferredRentReceivablesNetNoncurrent_39ddbe87-4e6c-40aa-b014-d50beab2a2dc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_28360f10-3695-4bcb-a8b5-06db72379828" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_28360f10-3695-4bcb-a8b5-06db72379828" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_ec5f6947-19ac-4e94-ac66-cfb90e456519" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_ec5f6947-19ac-4e94-ac66-cfb90e456519" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_0f235241-718a-4a50-9528-94c8739405ae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_us-gaap_Goodwill_0f235241-718a-4a50-9528-94c8739405ae" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_050e5cdc-b03a-400c-93b0-676d89ff0704" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_050e5cdc-b03a-400c-93b0-676d89ff0704" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_8a102b23-d24f-41a4-a8b6-83e47a9fe4c5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_8a102b23-d24f-41a4-a8b6-83e47a9fe4c5" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_7108c388-741c-40aa-a3a1-7fe534f6a95e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_d144bc8c-ca61-4439-9447-1974eccce313" xlink:to="loc_us-gaap_Assets_7108c388-741c-40aa-a3a1-7fe534f6a95e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_7bcb450c-49c8-478f-90ed-325015102d3c" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_24cd782a-0965-46e5-9f50-a954910a44cf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_us-gaap_AccountsPayableCurrent_24cd782a-0965-46e5-9f50-a954910a44cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_4c47f0d0-dcd9-4b4e-9ee2-1f6bf59f3bf2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_us-gaap_InterestPayableCurrent_4c47f0d0-dcd9-4b4e-9ee2-1f6bf59f3bf2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRevenueCurrent_8ce4a354-d82c-4a88-b477-abd90c6a17ab" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredRevenueCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_us-gaap_DeferredRevenueCurrent_8ce4a354-d82c-4a88-b477-abd90c6a17ab" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_09ac9b6b-5ce4-4033-bdb3-be2473223636" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_09ac9b6b-5ce4-4033-bdb3-be2473223636" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_Currentportionofoperatingleaseliabilitiesthirdparty_a9ccf611-9cf4-4ee2-8cc0-fd3744b8e401" xlink:href="gsv-20210630.xsd#gsv_Currentportionofoperatingleaseliabilitiesthirdparty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_gsv_Currentportionofoperatingleaseliabilitiesthirdparty_a9ccf611-9cf4-4ee2-8cc0-fd3744b8e401" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_Currentportionofoperatingleaseliabilitiesrelatedparty_58d5b404-eb91-4c43-8b53-9a71dd5c35c2" xlink:href="gsv-20210630.xsd#gsv_Currentportionofoperatingleaseliabilitiesrelatedparty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_gsv_Currentportionofoperatingleaseliabilitiesrelatedparty_58d5b404-eb91-4c43-8b53-9a71dd5c35c2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_5a2b821a-c15e-4bb2-9da0-de4156db4795" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_us-gaap_LiabilitiesCurrent_5a2b821a-c15e-4bb2-9da0-de4156db4795" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_12af5fba-ea46-42fd-98f0-4f699e15fdea" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_12af5fba-ea46-42fd-98f0-4f699e15fdea" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_Operatingleaseliabilitiesthirdparty_93935e56-809c-4d65-b2e8-015cfdf9b604" xlink:href="gsv-20210630.xsd#gsv_Operatingleaseliabilitiesthirdparty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_gsv_Operatingleaseliabilitiesthirdparty_93935e56-809c-4d65-b2e8-015cfdf9b604" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_Operatingleaseliabilitiesrelatedparty_1e7a3792-b264-4d31-93b1-cbfe73f7fe9f" xlink:href="gsv-20210630.xsd#gsv_Operatingleaseliabilitiesrelatedparty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_gsv_Operatingleaseliabilitiesrelatedparty_1e7a3792-b264-4d31-93b1-cbfe73f7fe9f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_3c9d6c77-569d-4971-974f-32ad146e3370" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_3c9d6c77-569d-4971-974f-32ad146e3370" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_c3a8a56f-6303-4ba1-954c-7fdafdeebe7a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_us-gaap_Liabilities_c3a8a56f-6303-4ba1-954c-7fdafdeebe7a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_be1fd1d5-78e2-44c6-9cb9-d84dfa2b9002" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_us-gaap_StockholdersEquityAbstract_be1fd1d5-78e2-44c6-9cb9-d84dfa2b9002" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersCapital_ede8d225-c805-48e5-9b55-8c2c2205653c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MembersCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_be1fd1d5-78e2-44c6-9cb9-d84dfa2b9002" xlink:to="loc_us-gaap_MembersCapital_ede8d225-c805-48e5-9b55-8c2c2205653c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_d206b1df-4ab8-4c33-a569-a0f2e9c010f4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_be1fd1d5-78e2-44c6-9cb9-d84dfa2b9002" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_d206b1df-4ab8-4c33-a569-a0f2e9c010f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersEquity_19c99350-4345-4aa7-afff-663a0dbdb794" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MembersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_be1fd1d5-78e2-44c6-9cb9-d84dfa2b9002" xlink:to="loc_us-gaap_MembersEquity_19c99350-4345-4aa7-afff-663a0dbdb794" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_1eef282a-4fd5-4d79-9e5a-09b7be6d664e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b3802b0c-c1f1-4a40-81d1-bd3cc05727c1" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_1eef282a-4fd5-4d79-9e5a-09b7be6d664e" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_ab23c86b-ca0a-403f-ac20-b52628a687a2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_fac0b536-887b-451e-837e-94ced77e1f31" xlink:to="loc_us-gaap_StatementTable_ab23c86b-ca0a-403f-ac20-b52628a687a2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.crowncastle.com/role/CondensedConsolidatedStatementofOperationsStatement" xlink:type="simple" xlink:href="gsv-20210630.xsd#CondensedConsolidatedStatementofOperationsStatement"/>
  <link:definitionLink xlink:role="http://www.crowncastle.com/role/CondensedConsolidatedStatementofOperationsStatement" xlink:type="extended" id="i003b0329b1704b74b98e85e80f0d48fe_CondensedConsolidatedStatementofOperationsStatement">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_965f1fea-5fb8-4279-a33c-30609055126b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_6c2ad85a-dcd0-4106-a636-aedde9181e1b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_965f1fea-5fb8-4279-a33c-30609055126b" xlink:to="loc_us-gaap_StatementTable_6c2ad85a-dcd0-4106-a636-aedde9181e1b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_132aa7e3-c700-4566-8326-a750ec87f3bc" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6c2ad85a-dcd0-4106-a636-aedde9181e1b" xlink:to="loc_srt_StatementScenarioAxis_132aa7e3-c700-4566-8326-a750ec87f3bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_132aa7e3-c700-4566-8326-a750ec87f3bc_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_132aa7e3-c700-4566-8326-a750ec87f3bc" xlink:to="loc_srt_ScenarioUnspecifiedDomain_132aa7e3-c700-4566-8326-a750ec87f3bc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_e0f728e5-84b5-4273-9aa3-7fc782ac75f9" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_132aa7e3-c700-4566-8326-a750ec87f3bc" xlink:to="loc_srt_ScenarioUnspecifiedDomain_e0f728e5-84b5-4273-9aa3-7fc782ac75f9" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.crowncastle.com/role/CondensedConsolidatedStatementofCashFlows" xlink:type="simple" xlink:href="gsv-20210630.xsd#CondensedConsolidatedStatementofCashFlows"/>
  <link:definitionLink xlink:role="http://www.crowncastle.com/role/CondensedConsolidatedStatementofCashFlows" xlink:type="extended" id="i0a0961c7ed05404193e099ffba223137_CondensedConsolidatedStatementofCashFlows">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_8b3081d7-cec7-425d-a528-98a7c01d2221" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_715a1956-fd81-4331-9096-654c8ff27a22" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8b3081d7-cec7-425d-a528-98a7c01d2221" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_715a1956-fd81-4331-9096-654c8ff27a22" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_cf7fb52f-ca6d-471d-ac40-aa5b516748d9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_715a1956-fd81-4331-9096-654c8ff27a22" xlink:to="loc_us-gaap_ProfitLoss_cf7fb52f-ca6d-471d-ac40-aa5b516748d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_cfee9fcb-8dfb-4db4-85b0-f291bc6d4206" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_715a1956-fd81-4331-9096-654c8ff27a22" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_cfee9fcb-8dfb-4db4-85b0-f291bc6d4206" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAmortizationAndAccretionNet_b9791bbb-d4c8-4f66-a8c7-77f1c1645740" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_cfee9fcb-8dfb-4db4-85b0-f291bc6d4206" xlink:to="loc_us-gaap_DepreciationAmortizationAndAccretionNet_b9791bbb-d4c8-4f66-a8c7-77f1c1645740" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_AmortizationOfDeferredFinancingCosts_e0f02e20-66ca-4f7c-8ed5-25ab11ef7663" xlink:href="gsv-20210630.xsd#gsv_AmortizationOfDeferredFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_cfee9fcb-8dfb-4db4-85b0-f291bc6d4206" xlink:to="loc_gsv_AmortizationOfDeferredFinancingCosts_e0f02e20-66ca-4f7c-8ed5-25ab11ef7663" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_c8d2cc02-318e-41f8-8596-717ee880f537" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_cfee9fcb-8dfb-4db4-85b0-f291bc6d4206" xlink:to="loc_us-gaap_AssetImpairmentCharges_c8d2cc02-318e-41f8-8596-717ee880f537" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_70842ccf-91b7-40d9-a04d-2481ae0a677a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_715a1956-fd81-4331-9096-654c8ff27a22" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_70842ccf-91b7-40d9-a04d-2481ae0a677a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_f024edf4-5fe8-4654-a36d-e7b48ce742f7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_70842ccf-91b7-40d9-a04d-2481ae0a677a" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_f024edf4-5fe8-4654-a36d-e7b48ce742f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableTrade_67064fa6-d8dd-4345-a15f-723152049de7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableTrade"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_70842ccf-91b7-40d9-a04d-2481ae0a677a" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableTrade_67064fa6-d8dd-4345-a15f-723152049de7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_6c3e723d-64ab-4a61-b16c-067f56154e83" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_70842ccf-91b7-40d9-a04d-2481ae0a677a" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_6c3e723d-64ab-4a61-b16c-067f56154e83" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInReceivables_31693cf1-565f-49e7-94f9-4053704329de" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_70842ccf-91b7-40d9-a04d-2481ae0a677a" xlink:to="loc_us-gaap_IncreaseDecreaseInReceivables_31693cf1-565f-49e7-94f9-4053704329de" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_6d888df6-e9e3-4f99-95b0-4c021f91a997" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_70842ccf-91b7-40d9-a04d-2481ae0a677a" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_6d888df6-e9e3-4f99-95b0-4c021f91a997" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3071e23d-423b-41e9-bf49-931eafb4734f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_70842ccf-91b7-40d9-a04d-2481ae0a677a" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3071e23d-423b-41e9-bf49-931eafb4734f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_752d5991-a7f1-4ec3-bb3a-99901cc321c4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8b3081d7-cec7-425d-a528-98a7c01d2221" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_752d5991-a7f1-4ec3-bb3a-99901cc321c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_18d0bcdf-afc1-4f7a-b02f-738126ca7d40" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_752d5991-a7f1-4ec3-bb3a-99901cc321c4" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_18d0bcdf-afc1-4f7a-b02f-738126ca7d40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_b5c1fdc4-a7a5-47da-9e80-bab2717d84c3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_752d5991-a7f1-4ec3-bb3a-99901cc321c4" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_b5c1fdc4-a7a5-47da-9e80-bab2717d84c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_270e7c94-907d-4797-b959-5689fefcfddd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8b3081d7-cec7-425d-a528-98a7c01d2221" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_270e7c94-907d-4797-b959-5689fefcfddd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseDueFromAffiliates_b7b468cf-f073-47f0-881c-8811ec66c4c5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseDueFromAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_270e7c94-907d-4797-b959-5689fefcfddd" xlink:to="loc_us-gaap_IncreaseDecreaseDueFromAffiliates_b7b468cf-f073-47f0-881c-8811ec66c4c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_814d3b4a-068a-4c2e-9878-1ddb209f8d42" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_270e7c94-907d-4797-b959-5689fefcfddd" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_814d3b4a-068a-4c2e-9878-1ddb209f8d42" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_99bc729a-7a18-45a6-8ca5-850a26bd595e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8b3081d7-cec7-425d-a528-98a7c01d2221" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_99bc729a-7a18-45a6-8ca5-850a26bd595e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_22d9709c-cfc7-4f5c-9ac6-dcd5a6933bf4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8b3081d7-cec7-425d-a528-98a7c01d2221" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_22d9709c-cfc7-4f5c-9ac6-dcd5a6933bf4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_572980bc-d8ed-42d0-b296-cbacb8afe8b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_216b0a55-5865-4219-a551-1412f654b751" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_8b3081d7-cec7-425d-a528-98a7c01d2221" xlink:to="loc_us-gaap_StatementTable_216b0a55-5865-4219-a551-1412f654b751" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_cd524766-bdcb-4878-9728-bf663b61b847" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_216b0a55-5865-4219-a551-1412f654b751" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_cd524766-bdcb-4878-9728-bf663b61b847" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_cd524766-bdcb-4878-9728-bf663b61b847_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_cd524766-bdcb-4878-9728-bf663b61b847" xlink:to="loc_us-gaap_EquityComponentDomain_cd524766-bdcb-4878-9728-bf663b61b847_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_9bd239d5-3b0f-41e4-8cfe-e313be58b539" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_cd524766-bdcb-4878-9728-bf663b61b847" xlink:to="loc_us-gaap_EquityComponentDomain_9bd239d5-3b0f-41e4-8cfe-e313be58b539" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.crowncastle.com/role/CondensedConsolidatedStatementofEquity" xlink:type="simple" xlink:href="gsv-20210630.xsd#CondensedConsolidatedStatementofEquity"/>
  <link:definitionLink xlink:role="http://www.crowncastle.com/role/CondensedConsolidatedStatementofEquity" xlink:type="extended" id="i9bdca6e9e3714d2fae96126a07b5284b_CondensedConsolidatedStatementofEquity">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_04dd339b-67ca-4c20-bdee-2a58258ad67f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e2ac667a-eb64-48e5-875b-0465ef3ddaa9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_04dd339b-67ca-4c20-bdee-2a58258ad67f" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e2ac667a-eb64-48e5-875b-0465ef3ddaa9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersEquity_192beb28-eada-421d-8d06-5fc72ee24f70" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MembersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e2ac667a-eb64-48e5-875b-0465ef3ddaa9" xlink:to="loc_us-gaap_MembersEquity_192beb28-eada-421d-8d06-5fc72ee24f70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseDueFromAffiliates_59c47231-1fe4-4f5f-a503-1c12f6e356e6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseDueFromAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e2ac667a-eb64-48e5-875b-0465ef3ddaa9" xlink:to="loc_us-gaap_IncreaseDecreaseDueFromAffiliates_59c47231-1fe4-4f5f-a503-1c12f6e356e6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_bc3e746e-a1da-49f2-aff9-0ef11ed6bef0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_e2ac667a-eb64-48e5-875b-0465ef3ddaa9" xlink:to="loc_us-gaap_ProfitLoss_bc3e746e-a1da-49f2-aff9-0ef11ed6bef0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersEquity_7e6020d1-2aa8-48d5-a21b-76bd0e9e9525" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MembersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_1246f641-392c-40a7-a370-4a3c7186b067" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_04dd339b-67ca-4c20-bdee-2a58258ad67f" xlink:to="loc_us-gaap_StatementTable_1246f641-392c-40a7-a370-4a3c7186b067" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_7e26948a-36f9-416d-83f3-f048ee4c2a6e" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1246f641-392c-40a7-a370-4a3c7186b067" xlink:to="loc_srt_StatementScenarioAxis_7e26948a-36f9-416d-83f3-f048ee4c2a6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_7e26948a-36f9-416d-83f3-f048ee4c2a6e_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_7e26948a-36f9-416d-83f3-f048ee4c2a6e" xlink:to="loc_srt_ScenarioUnspecifiedDomain_7e26948a-36f9-416d-83f3-f048ee4c2a6e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_09c9791b-0201-4c75-8dc4-417946e14153" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_7e26948a-36f9-416d-83f3-f048ee4c2a6e" xlink:to="loc_srt_ScenarioUnspecifiedDomain_09c9791b-0201-4c75-8dc4-417946e14153" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_bc2d733f-3947-44c4-a468-5575ccf6b0a7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1246f641-392c-40a7-a370-4a3c7186b067" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_bc2d733f-3947-44c4-a468-5575ccf6b0a7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_bc2d733f-3947-44c4-a468-5575ccf6b0a7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_bc2d733f-3947-44c4-a468-5575ccf6b0a7" xlink:to="loc_us-gaap_EquityComponentDomain_bc2d733f-3947-44c4-a468-5575ccf6b0a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_8a560085-47a3-406d-9e89-ef916cfe0a80" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_bc2d733f-3947-44c4-a468-5575ccf6b0a7" xlink:to="loc_us-gaap_EquityComponentDomain_8a560085-47a3-406d-9e89-ef916cfe0a80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_MembersCapitalMember_216d50c8-7f74-412e-b4db-da22f4e43a58" xlink:href="gsv-20210630.xsd#gsv_MembersCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_8a560085-47a3-406d-9e89-ef916cfe0a80" xlink:to="loc_gsv_MembersCapitalMember_216d50c8-7f74-412e-b4db-da22f4e43a58" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_6ec9d08d-7f8e-45c2-b533-e33edef92844" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_8a560085-47a3-406d-9e89-ef916cfe0a80" xlink:to="loc_us-gaap_RetainedEarningsMember_6ec9d08d-7f8e-45c2-b533-e33edef92844" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.crowncastle.com/role/GeneralBusinessDetails" xlink:type="simple" xlink:href="gsv-20210630.xsd#GeneralBusinessDetails"/>
  <link:definitionLink xlink:role="http://www.crowncastle.com/role/GeneralBusinessDetails" xlink:type="extended" id="i2dfa7df032374e23907b9f1ac4401274_GeneralBusinessDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_78f85fdc-23d7-4a33-9b0b-eb886c3f58f8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_TowerCountPercentage_032ec743-fc5d-46d2-a7fc-f04044ef219e" xlink:href="gsv-20210630.xsd#gsv_TowerCountPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_78f85fdc-23d7-4a33-9b0b-eb886c3f58f8" xlink:to="loc_gsv_TowerCountPercentage_032ec743-fc5d-46d2-a7fc-f04044ef219e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_PurchaseOptionSprintSites_07ce457d-1206-43a3-a5f1-2da9195c788b" xlink:href="gsv-20210630.xsd#gsv_PurchaseOptionSprintSites"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_78f85fdc-23d7-4a33-9b0b-eb886c3f58f8" xlink:to="loc_gsv_PurchaseOptionSprintSites_07ce457d-1206-43a3-a5f1-2da9195c788b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_f76a33df-700a-4ec8-b786-f52a865cbc9e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_78f85fdc-23d7-4a33-9b0b-eb886c3f58f8" xlink:to="loc_us-gaap_StatementTable_f76a33df-700a-4ec8-b786-f52a865cbc9e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_ContractualTermsAxis_5993ca52-901a-4496-8bd1-3f1d5cb74747" xlink:href="gsv-20210630.xsd#gsv_ContractualTermsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_f76a33df-700a-4ec8-b786-f52a865cbc9e" xlink:to="loc_gsv_ContractualTermsAxis_5993ca52-901a-4496-8bd1-3f1d5cb74747" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_ContractualTermsDomain_5993ca52-901a-4496-8bd1-3f1d5cb74747_default" xlink:href="gsv-20210630.xsd#gsv_ContractualTermsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gsv_ContractualTermsAxis_5993ca52-901a-4496-8bd1-3f1d5cb74747" xlink:to="loc_gsv_ContractualTermsDomain_5993ca52-901a-4496-8bd1-3f1d5cb74747_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_ContractualTermsDomain_0e8a3d6f-2ad5-40e7-96a6-2a3bfe420b30" xlink:href="gsv-20210630.xsd#gsv_ContractualTermsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gsv_ContractualTermsAxis_5993ca52-901a-4496-8bd1-3f1d5cb74747" xlink:to="loc_gsv_ContractualTermsDomain_0e8a3d6f-2ad5-40e7-96a6-2a3bfe420b30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_LeasedOrOperatedUnderMasterLeaseAgreementsMember_22dd8156-3355-4f3e-8ec7-f1706bd2f33f" xlink:href="gsv-20210630.xsd#gsv_LeasedOrOperatedUnderMasterLeaseAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gsv_ContractualTermsDomain_0e8a3d6f-2ad5-40e7-96a6-2a3bfe420b30" xlink:to="loc_gsv_LeasedOrOperatedUnderMasterLeaseAgreementsMember_22dd8156-3355-4f3e-8ec7-f1706bd2f33f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.crowncastle.com/role/DebtandOtherObligationsIndebtednessDetails" xlink:type="simple" xlink:href="gsv-20210630.xsd#DebtandOtherObligationsIndebtednessDetails"/>
  <link:definitionLink xlink:role="http://www.crowncastle.com/role/DebtandOtherObligationsIndebtednessDetails" xlink:type="extended" id="i85b8e601d48e45edae1c250b65fd1e71_DebtandOtherObligationsIndebtednessDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_d11c2668-ab32-422f-be06-53a529471838" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_0cc0bb02-0724-4c67-abc3-b0e2ecc39d35" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d11c2668-ab32-422f-be06-53a529471838" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_0cc0bb02-0724-4c67-abc3-b0e2ecc39d35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_d041c780-20cd-4dd2-82d6-a50848475c97" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d11c2668-ab32-422f-be06-53a529471838" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_d041c780-20cd-4dd2-82d6-a50848475c97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_533216b9-206c-421c-87f1-5a72fd577e75" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d11c2668-ab32-422f-be06-53a529471838" xlink:to="loc_us-gaap_DebtInstrumentTable_533216b9-206c-421c-87f1-5a72fd577e75" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_9c533751-695c-45fa-a119-5e4db9757d0b" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_533216b9-206c-421c-87f1-5a72fd577e75" xlink:to="loc_srt_StatementScenarioAxis_9c533751-695c-45fa-a119-5e4db9757d0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_9c533751-695c-45fa-a119-5e4db9757d0b_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_9c533751-695c-45fa-a119-5e4db9757d0b" xlink:to="loc_srt_ScenarioUnspecifiedDomain_9c533751-695c-45fa-a119-5e4db9757d0b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_f1882793-f041-44eb-8cdf-08873d6311c8" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_9c533751-695c-45fa-a119-5e4db9757d0b" xlink:to="loc_srt_ScenarioUnspecifiedDomain_f1882793-f041-44eb-8cdf-08873d6311c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_bc50290b-7a7a-4c11-b998-a719c314fc3b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_533216b9-206c-421c-87f1-5a72fd577e75" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_bc50290b-7a7a-4c11-b998-a719c314fc3b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_bc50290b-7a7a-4c11-b998-a719c314fc3b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_bc50290b-7a7a-4c11-b998-a719c314fc3b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_bc50290b-7a7a-4c11-b998-a719c314fc3b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_298b1111-2fbf-497a-9a4b-fab942ed6f81" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_bc50290b-7a7a-4c11-b998-a719c314fc3b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_298b1111-2fbf-497a-9a4b-fab942ed6f81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_A2012SecuredNotesTrancheBMember_6c76cc44-416e-4abb-b88c-068d24cf20de" xlink:href="gsv-20210630.xsd#gsv_A2012SecuredNotesTrancheBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_298b1111-2fbf-497a-9a4b-fab942ed6f81" xlink:to="loc_gsv_A2012SecuredNotesTrancheBMember_6c76cc44-416e-4abb-b88c-068d24cf20de" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.crowncastle.com/role/RelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="gsv-20210630.xsd#RelatedPartyTransactionsDetails"/>
  <link:definitionLink xlink:role="http://www.crowncastle.com/role/RelatedPartyTransactionsDetails" xlink:type="extended" id="ie303f89448254749acf80936fe8f9e8a_RelatedPartyTransactionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_f92e44d1-a44c-4881-992a-a4f6d619d111" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyManagementFeePercentFee_292eba04-b7d0-461b-a186-4ccaa5a8538d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyManagementFeePercentFee"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_f92e44d1-a44c-4881-992a-a4f6d619d111" xlink:to="loc_us-gaap_PropertyManagementFeePercentFee_292eba04-b7d0-461b-a186-4ccaa5a8538d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_RelatedPartyTransactionPercentageofTowersWhereLandisOwnedbyRelatedParty_95931991-aa6f-4274-9af2-31dc462a0230" xlink:href="gsv-20210630.xsd#gsv_RelatedPartyTransactionPercentageofTowersWhereLandisOwnedbyRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_f92e44d1-a44c-4881-992a-a4f6d619d111" xlink:to="loc_gsv_RelatedPartyTransactionPercentageofTowersWhereLandisOwnedbyRelatedParty_95931991-aa6f-4274-9af2-31dc462a0230" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseDueFromAffiliates_a1b26c27-43ef-4d66-86c3-16c7160065b6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseDueFromAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_f92e44d1-a44c-4881-992a-a4f6d619d111" xlink:to="loc_us-gaap_IncreaseDecreaseDueFromAffiliates_a1b26c27-43ef-4d66-86c3-16c7160065b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f4b3d654-7ee8-4c24-9c8f-f47bf1fd4a4d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_f92e44d1-a44c-4881-992a-a4f6d619d111" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f4b3d654-7ee8-4c24-9c8f-f47bf1fd4a4d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_896532e9-c60f-4d89-b0f9-2db8952f4318" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f4b3d654-7ee8-4c24-9c8f-f47bf1fd4a4d" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_896532e9-c60f-4d89-b0f9-2db8952f4318" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_896532e9-c60f-4d89-b0f9-2db8952f4318_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_896532e9-c60f-4d89-b0f9-2db8952f4318" xlink:to="loc_us-gaap_EquityComponentDomain_896532e9-c60f-4d89-b0f9-2db8952f4318_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e3574c50-c229-4d64-b3d6-d589a437a503" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_896532e9-c60f-4d89-b0f9-2db8952f4318" xlink:to="loc_us-gaap_EquityComponentDomain_e3574c50-c229-4d64-b3d6-d589a437a503" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_e3593331-7a16-42ce-a8a7-4645d77b63cf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f4b3d654-7ee8-4c24-9c8f-f47bf1fd4a4d" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_e3593331-7a16-42ce-a8a7-4645d77b63cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_e3593331-7a16-42ce-a8a7-4645d77b63cf_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_e3593331-7a16-42ce-a8a7-4645d77b63cf" xlink:to="loc_us-gaap_RelatedPartyDomain_e3593331-7a16-42ce-a8a7-4645d77b63cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_adb0027a-d2f0-4e38-a76b-763132f4c588" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_e3593331-7a16-42ce-a8a7-4645d77b63cf" xlink:to="loc_us-gaap_RelatedPartyDomain_adb0027a-d2f0-4e38-a76b-763132f4c588" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_9a30b832-e29a-4a06-9570-93de54cbfe60" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_adb0027a-d2f0-4e38-a76b-763132f4c588" xlink:to="loc_srt_AffiliatedEntityMember_9a30b832-e29a-4a06-9570-93de54cbfe60" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.crowncastle.com/role/FairValueDisclosuresEstimatedFairValuesandCarryingAmountsofAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="gsv-20210630.xsd#FairValueDisclosuresEstimatedFairValuesandCarryingAmountsofAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.crowncastle.com/role/FairValueDisclosuresEstimatedFairValuesandCarryingAmountsofAssetsandLiabilitiesDetails" xlink:type="extended" id="i035daacffb6e4254849603c909950e71_FairValueDisclosuresEstimatedFairValuesandCarryingAmountsofAssetsandLiabilitiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_83d39c38-2fea-476f-b2fb-1e7fa1c20167" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_049a3598-6c6e-4868-90d7-c0d37929d969" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_83d39c38-2fea-476f-b2fb-1e7fa1c20167" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_049a3598-6c6e-4868-90d7-c0d37929d969" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_15189dd3-8687-44b7-928e-555ee4c8d494" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_83d39c38-2fea-476f-b2fb-1e7fa1c20167" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_15189dd3-8687-44b7-928e-555ee4c8d494" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_52ec702b-9af6-4eac-9306-45adfcfec9e8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_83d39c38-2fea-476f-b2fb-1e7fa1c20167" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_52ec702b-9af6-4eac-9306-45adfcfec9e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_DebtAndCapitalLeaseObligationsFairValueDisclosures_8dbfa6fb-0298-44e9-81c5-b642f2c4cdd9" xlink:href="gsv-20210630.xsd#gsv_DebtAndCapitalLeaseObligationsFairValueDisclosures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_83d39c38-2fea-476f-b2fb-1e7fa1c20167" xlink:to="loc_gsv_DebtAndCapitalLeaseObligationsFairValueDisclosures_8dbfa6fb-0298-44e9-81c5-b642f2c4cdd9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_d06e8b53-da8f-4d26-a087-1ff51e9ccd3c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_83d39c38-2fea-476f-b2fb-1e7fa1c20167" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_d06e8b53-da8f-4d26-a087-1ff51e9ccd3c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8339359d-507f-40d5-ba11-3ae418865c4f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_d06e8b53-da8f-4d26-a087-1ff51e9ccd3c" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8339359d-507f-40d5-ba11-3ae418865c4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8339359d-507f-40d5-ba11-3ae418865c4f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8339359d-507f-40d5-ba11-3ae418865c4f" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8339359d-507f-40d5-ba11-3ae418865c4f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4f148de8-4378-4641-87f0-8848ac07da3d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8339359d-507f-40d5-ba11-3ae418865c4f" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4f148de8-4378-4641-87f0-8848ac07da3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_29c3f843-79c5-4103-98cb-0d143b7bf3da" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4f148de8-4378-4641-87f0-8848ac07da3d" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_29c3f843-79c5-4103-98cb-0d143b7bf3da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_da1ddac0-7a66-4d05-8aad-fddfba03713d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4f148de8-4378-4641-87f0-8848ac07da3d" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_da1ddac0-7a66-4d05-8aad-fddfba03713d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.crowncastle.com/role/CommitmentsandContingenciesTowercountasapercentageoftotaltowersDetails" xlink:type="simple" xlink:href="gsv-20210630.xsd#CommitmentsandContingenciesTowercountasapercentageoftotaltowersDetails"/>
  <link:definitionLink xlink:role="http://www.crowncastle.com/role/CommitmentsandContingenciesTowercountasapercentageoftotaltowersDetails" xlink:type="extended" id="ifabb12ef1f504b158a686dd5dff3a5f8_CommitmentsandContingenciesTowercountasapercentageoftotaltowersDetails">
    <link:loc xlink:type="locator" xlink:label="loc_gsv_ContractualTermsLineItems_6bdabf81-1ac5-4df6-921c-e2d934443475" xlink:href="gsv-20210630.xsd#gsv_ContractualTermsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_ContractualTermsTable_54d98c06-8111-4deb-8639-bd25cf940aae" xlink:href="gsv-20210630.xsd#gsv_ContractualTermsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gsv_ContractualTermsLineItems_6bdabf81-1ac5-4df6-921c-e2d934443475" xlink:to="loc_gsv_ContractualTermsTable_54d98c06-8111-4deb-8639-bd25cf940aae" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_ContractualTermsAxis_15832c29-2963-4f71-9fc6-6d43893413ba" xlink:href="gsv-20210630.xsd#gsv_ContractualTermsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gsv_ContractualTermsTable_54d98c06-8111-4deb-8639-bd25cf940aae" xlink:to="loc_gsv_ContractualTermsAxis_15832c29-2963-4f71-9fc6-6d43893413ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_ContractualTermsDomain_15832c29-2963-4f71-9fc6-6d43893413ba_default" xlink:href="gsv-20210630.xsd#gsv_ContractualTermsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gsv_ContractualTermsAxis_15832c29-2963-4f71-9fc6-6d43893413ba" xlink:to="loc_gsv_ContractualTermsDomain_15832c29-2963-4f71-9fc6-6d43893413ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_ContractualTermsDomain_488322b7-175f-43c2-823e-cc2ab2673fda" xlink:href="gsv-20210630.xsd#gsv_ContractualTermsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gsv_ContractualTermsAxis_15832c29-2963-4f71-9fc6-6d43893413ba" xlink:to="loc_gsv_ContractualTermsDomain_488322b7-175f-43c2-823e-cc2ab2673fda" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gsv_LeasedOrOperatedUnderMasterLeaseAgreementsMember_5a315d3c-ea24-4a10-99a4-ef2c9605bf5a" xlink:href="gsv-20210630.xsd#gsv_LeasedOrOperatedUnderMasterLeaseAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gsv_ContractualTermsDomain_488322b7-175f-43c2-823e-cc2ab2673fda" xlink:to="loc_gsv_LeasedOrOperatedUnderMasterLeaseAgreementsMember_5a315d3c-ea24-4a10-99a4-ef2c9605bf5a" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
