at·​test | \ə-ˈtest \
attested; attesting; attests

Definition of attest 

transitive verb

1a : to affirm to be true or genuine specifically : to authenticate by signing as a witness

b : to authenticate officially

2 : to establish or verify the usage of The first use of the word "Internet" is attested in 1985.

3 : to be proof of : manifest Her record attests her integrity.

4 : to put on oath

intransitive verb

: to show, prove, or state that something is true or real usually used with to I can attest to the truth of his statement.attest to a belief

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Other Words from attest

attestation \ ˌa-​ˌtes-​ˈtā-​shən , ˌa-​tə-​ˈstā-​ \ noun
attester \ ə-​ˈtes-​tər \ noun

Choose the Right Synonym for attest

certify, attest, witness, vouch mean to testify to the truth or genuineness of something. certify usually applies to a written statement, especially one carrying a signature or seal. certified that the candidate had met all requirements attest applies to oral or written testimony usually from experts or witnesses. attested to the authenticity of the document witness applies to the subscribing of one's own name to a document as evidence of its genuineness. witnessed the signing of the will vouch applies to one who testifies as a competent authority or a reliable person. willing to vouch for her integrity

Examples of attest in a Sentence

I can attest that what he has said is true. The certificate attests the authenticity of the painting.

Recent Examples on the Web

Moorhead’s offense challenges defensive backs, as Penn State’s numbers can attest. Ross Dellenger,, "Nick Fitzgerald Rehabs and Readies to Embrace an Offense That Could Make Him Better Than Ever," 27 June 2018 De Leon produced, plain and simple, as attested via her .506 average (46 for 83) with 11 doubles, eight home runs, 37 runs and a whopping 46 RBI. Grant Gordon,, "Crescenta Valley softball's Hernandez' phenomenal freshman year leads to league pitcher of year award," 20 June 2018 But as most Broadway veterans can attest, the path to the Tonys was not without a few bumps in the road. Maria Ward, Vogue, "Broadway’s Brightest Partied Until Dawn at The Carlyle on Tonys Night," 11 June 2018 Now, most immigrants choose to fight their deportations, as the mammoth 680,000-plus case backlog can attest. Kavitha Surana,, "How immigration officers can get away with racial profiling," 8 June 2018 As history attests, the Bush Administration apparently didn’t believe Baghdad’s insistence that the program had been curtailed, and on March 20, 2003, the first of tens of thousands of U.S troops rolled into Iraq. Peter Schwartzstein, Smithsonian, "How Saddam and ISIS Killed Iraqi Science," 30 May 2018 The company asks candidates to provide concrete evidence of their skills and talks with others who might be able to attest to their work, the representatives said. Sarah Freishtat, Aurora Beacon-News, "East Aurora moves to beef up background checks on superintendent candidates," 8 May 2018 Members and allies of the Trump administration have been quick to defend him and to attest to his good character. Jill Filipovic, Cosmopolitan, "The Defense of Alleged Abuser Rob Porter Shows Exactly What a Woman's Word Is Worth in This Country," 8 Feb. 2018 An exploding phone can ruin your whole day, as Samsung could attest. David Pogue, Scientific American, "Batteries Have Gotten Better, but There's Still Room for Improvement," 1 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'attest.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of attest

circa 1500, in the meaning defined at transitive sense 1a

History and Etymology for attest

Middle French attester, from Latin attestari, from ad- + testis witness — more at testament

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Statistics for attest

Last Updated

4 Nov 2018

Look-up Popularity

Time Traveler for attest

The first known use of attest was circa 1500

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More Definitions for attest



English Language Learners Definition of attest

: to show, prove, or state that something is true or real


at·​test | \ə-ˈtest \
attested; attesting

Kids Definition of attest

: to show or give proof of : say to be true I can attest to his innocence.


at·​test | \ə-ˈtest \

Legal Definition of attest 

transitive verb

: to bear witness to : affirm to be true or genuine specifically : to authenticate (as a will) by signing as a witness

intransitive verb

: to bear witness : testify often used with to

Other Words from attest

attestation \ ˌa-​ˌtes-​ˈtā-​shən \ noun

History and Etymology for attest

Latin attestari, from ad to + testari to call to witness, from testis witness

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More from Merriam-Webster on attest

Thesaurus: All synonyms and antonyms for attest

Spanish Central: Translation of attest

Nglish: Translation of attest for Spanish Speakers

Britannica English: Translation of attest for Arabic Speakers

Comments on attest

What made you want to look up attest? Please tell us where you read or heard it (including the quote, if possible).


something that serves to warn or remind

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