To bear witness; to; to certify; to affirm to be true or genuine; to make a solemn declaration in words or writing, to support a fact; appropriately used the affirmation of persons in their official capacity; as, to attest the truth of a writing; to attest a copy of record. Persons also attest writings by subscribing their names.

To bear witness, or support the truth of a fact, by other evidence than words; as, the ruins of Palmyra attest its ancient magnificence.

To call to witness; to invoke as conscious. The sacred streams which heaven's imperial state Attests in oaths, and fears to violate.

Witness; testimony; attestation.