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; .
- (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
1590s, from Middle French attester (Old French atester, 13c.) “affirm, attest,” from Latin attestari “confirm,” literally “bear witness to,” from ad- “to” (see ) + testari “bear witness,” from testis “witness” (see ). Related: Attested; attesting.