Pronunciation: (u-test'),[key] —v.t. 1. to bear witness to; certify; declare to be correct, true, or genuine; declare the truth of, in words or writing, esp. affirm in an official capacity: to attest the truth of a statement. 2. to give proof or evidence of; manifest: His works attest his industry. 3. to put on oath.
—v.i. to testify or bear witness (often fol. by to): to attest to the reliability of an employee.