- 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.
- 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)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (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
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
Word Origin and History for unattested
Online Etymology Dictionary, © 2010 Douglas Harper