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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:69ee8a5d-1986-4b2d-ac6a-dd5b340ed8bf,g:f9e43463-3a8f-4024-931e-d5edfed37dcb-->
<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.cnta.com/role/Cover" xlink:type="simple" xlink:href="cnta-20220602.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.cnta.com/role/Cover" xlink:type="extended" id="i69a61769225149378b612e89087ea379_Cover">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_1e8f21a2-72e9-46b5-b4f4-ad55bcc4c2ce" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_DocumentType_1e8f21a2-72e9-46b5-b4f4-ad55bcc4c2ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_50fe8800-4aa6-4bda-8fc6-cb9a2732ccbb" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_DocumentPeriodEndDate_50fe8800-4aa6-4bda-8fc6-cb9a2732ccbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_79d3d207-6014-489f-a5b7-b31c5d94d6d3" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityRegistrantName_79d3d207-6014-489f-a5b7-b31c5d94d6d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_7e062f18-7405-4c21-a786-090a1d38f224" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityIncorporationStateCountryCode_7e062f18-7405-4c21-a786-090a1d38f224" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_641de628-2c26-4c36-86d8-52df830c6672" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityFileNumber_641de628-2c26-4c36-86d8-52df830c6672" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_8fb24fba-f6aa-4646-82a3-ce6b357fe155" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityAddressAddressLine1_8fb24fba-f6aa-4646-82a3-ce6b357fe155" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_c9243405-8544-4f66-bf0e-ddbf5f5ff6cf" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityAddressAddressLine2_c9243405-8544-4f66-bf0e-ddbf5f5ff6cf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine3_ce391cc8-153b-40e6-acbd-5599224cd268" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine3"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityAddressAddressLine3_ce391cc8-153b-40e6-acbd-5599224cd268" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_fca25cfc-0319-4875-a3c8-dfe60ae7ae66" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityAddressCityOrTown_fca25cfc-0319-4875-a3c8-dfe60ae7ae66" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_b367955f-654e-47ae-b66b-47c1a9e618ec" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityAddressPostalZipCode_b367955f-654e-47ae-b66b-47c1a9e618ec" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCountry_69bb22dd-a400-46c2-a9f6-dbfd2bb4037a" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressCountry"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityAddressCountry_69bb22dd-a400-46c2-a9f6-dbfd2bb4037a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CountryRegion_3fcf2287-2638-4a3e-aba8-4281e36ec5aa" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CountryRegion"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_CountryRegion_3fcf2287-2638-4a3e-aba8-4281e36ec5aa" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_f43974dd-18e8-49cb-a591-333837186079" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_CityAreaCode_f43974dd-18e8-49cb-a591-333837186079" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_221b7adb-580d-423a-ab53-2d43e7420599" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_LocalPhoneNumber_221b7adb-580d-423a-ab53-2d43e7420599" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_0078d4c0-3ef3-4e83-a53c-9e5d1c038a89" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_WrittenCommunications_0078d4c0-3ef3-4e83-a53c-9e5d1c038a89" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_718de97f-72ca-4d43-86b7-b231b8464f41" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_SolicitingMaterial_718de97f-72ca-4d43-86b7-b231b8464f41" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_04cab7e0-d914-4463-b1c9-3929262afc6c" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_PreCommencementTenderOffer_04cab7e0-d914-4463-b1c9-3929262afc6c" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_a13ff131-f064-437c-81f4-696cc8b1398e" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_a13ff131-f064-437c-81f4-696cc8b1398e" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_8c044cb6-8eaf-4f5f-9e2f-20be091b042c" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_Security12bTitle_8c044cb6-8eaf-4f5f-9e2f-20be091b042c" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_7ca39fbb-aa46-4238-a82a-e95f0f771c62" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_TradingSymbol_7ca39fbb-aa46-4238-a82a-e95f0f771c62" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_e4231eeb-f412-4361-b0db-3c4b539ae567" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_SecurityExchangeName_e4231eeb-f412-4361-b0db-3c4b539ae567" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_1f198d5a-e50e-4492-8481-c23fe2fdfef4" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityEmergingGrowthCompany_1f198d5a-e50e-4492-8481-c23fe2fdfef4" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod_f4b73e55-2470-4177-9085-beb209a02fed" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityExTransitionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityExTransitionPeriod_f4b73e55-2470-4177-9085-beb209a02fed" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_4e8e4685-9591-455a-a0a8-e18ad35c0842" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_AmendmentFlag_4e8e4685-9591-455a-a0a8-e18ad35c0842" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_9eb2daae-c83c-4e8b-a650-6d318d95c5ef" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_EntityCentralIndexKey_9eb2daae-c83c-4e8b-a650-6d318d95c5ef" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_4c2982de-7cd6-4fc5-abad-e561c7b42c0d" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_7af9ec2d-f0f7-4b2b-b9e4-36d1f43d3465" xlink:to="loc_dei_DocumentInformationTable_4c2982de-7cd6-4fc5-abad-e561c7b42c0d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_d7471134-d243-41c7-a558-05478b1cbd44" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_4c2982de-7cd6-4fc5-abad-e561c7b42c0d" xlink:to="loc_us-gaap_StatementClassOfStockAxis_d7471134-d243-41c7-a558-05478b1cbd44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_d7471134-d243-41c7-a558-05478b1cbd44_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_d7471134-d243-41c7-a558-05478b1cbd44" xlink:to="loc_us-gaap_ClassOfStockDomain_d7471134-d243-41c7-a558-05478b1cbd44_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_80a6dc2c-1a84-4332-858e-5d3d9e257f76" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_d7471134-d243-41c7-a558-05478b1cbd44" xlink:to="loc_us-gaap_ClassOfStockDomain_80a6dc2c-1a84-4332-858e-5d3d9e257f76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_0c79de12-295a-4163-9e6b-884fa8ccb8b2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_80a6dc2c-1a84-4332-858e-5d3d9e257f76" xlink:to="loc_us-gaap_CommonStockMember_0c79de12-295a-4163-9e6b-884fa8ccb8b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cnta_AmericanDepositarySharesMember_5b27650c-c2f1-4e11-a738-3ff8345aa122" xlink:href="cnta-20220602.xsd#cnta_AmericanDepositarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_80a6dc2c-1a84-4332-858e-5d3d9e257f76" xlink:to="loc_cnta_AmericanDepositarySharesMember_5b27650c-c2f1-4e11-a738-3ff8345aa122" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
