- 1[intransitive, transitive] attest (to something) attest (that…) attest (something) to show or prove that something is true synonym bear witness to Contemporary accounts attest to his courage and determination. She is, as countless stories about her attest, deeply religious.
- 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.
NAmE//əˈtɛst//(formal)Verb Forms present simple I / you / we / they attest
he / she / it attests
past simple attested
-ing form attesting