Definition of attest verb from the Oxford Advanced Learner's Dictionary

     

    attest

     verb
    verb
    BrE BrE//əˈtest//
     
    ; NAmE NAmE//əˈtest//
     
    (formal)Verb Forms present simple I / you / we / they attest
    BrE BrE//əˈtest//
     
    ; NAmE NAmE//əˈtest//
     
    he / she / it attests
    BrE BrE//əˈtests//
     
    ; NAmE NAmE//əˈtests//
     
    past simple attested
    BrE BrE//əˈtestɪd//
     
    ; NAmE NAmE//əˈtestɪd//
     
    past participle attested
    BrE BrE//əˈtestɪd//
     
    ; NAmE NAmE//əˈtestɪd//
     
    -ing form attesting
    BrE BrE//əˈtestɪŋ//
     
    ; NAmE NAmE//əˈtestɪŋ//
     
     
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  1. 1[intransitive, transitive] attest (to something) | attest (that…) | attest (something) to show or prove that something is true synonym bear/give witness (to something) Contemporary accounts attest to his courage and determination. She is, as countless stories about her attest, deeply religious.
  2. 2[transitive] attest (something) | attest (that…) to state that you believe that something is true or genuine, for example in court to attest a will The signature was attested by two witnesses.
  3. Word Origin early 16th cent.: from French attester, from Latin attestari, from ad- ‘to’ + testari ‘to witness’ (from testis ‘a witness’).
See the Oxford Advanced American Dictionary entry: attest