(1):
(n.) Witness; testimony; attestation.
(2):
(v. t.) To call to witness; to invoke.
(3):
(v. t.) To bear witness to; to certify; to affirm to be true or genuine; as, to attest the truth of a writing, a copy of record.
(4):
(v. t.) To give proof of; to manifest; as, the ruins of Palmyra attest its ancient magnificence.