[ uh-test ]
/ əˈtɛst /

verb (used with object)

to bear witness to; certify; declare to be correct, true, or genuine; declare the truth of, in words or writing, especially affirm in an official capacity: to attest the truth of a statement.
to give proof or evidence of; manifest: His works attest his industry.
to put on oath.

verb (used without object)

to testify or bear witness (often followed by to): to attest to the reliability of an employee.


Archaic. witness; testimony; attestation.

Origin of attest

1590–1600; (< Middle French attester) < Latin attestārī to bear witness to, equivalent to at- at- + testārī (test(is) a witness + -ā- thematic vowel + -rī infinitive suffix)

OTHER WORDS FROM attest Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for attested (1 of 2)

/ (əˈtɛstɪd) /


British (of cattle, etc) certified to be free from a disease, esp from tuberculosis

British Dictionary definitions for attested (2 of 2)

/ (əˈtɛst) /


(tr) to affirm the correctness or truth of
(when intr, usually foll by to) to witness (an act, event, etc) or bear witness to (an act, event, etc) as by signature or oath
(tr) to make evident; demonstratehis life of luxury attests his wealth
(tr) to provide evidence forthe marks in the ground attested the presence of a fossil

Derived forms of attest

attestable, adjectiveattestant, attester, esp law attestor or attestator, nounattestation (ˌætɛˈsteɪʃən), noun

Word Origin for attest

C16: from Latin attestārī to prove, from testārī to bear witness, from testis a witness
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012