At"test" (&?;), v. t. [imp. & p. p. Attested; p. pr. & vb. n. Attesting.] [L. attestari; ad + testari to bear witness: cf. F. attester.] 1. 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.

Facts . . . attested by particular pagan authors.
Addison.

2. To give proof of; to manifest; as, the ruins of Palmyra attest its ancient magnificence.

3. To call to witness; to invoke. [Archaic]

The sacred streams which Heaven's imperial state
Attests in oaths, and fears to violate.
Dryden.

At*test", n. Witness; testimony; attestation. [R.]

The attest of eyes and ears.
Shak.

• To affirm to be correct, true, or genuine.
        The date of the painting was attested by the appraiser.
  
• To certify by signature or oath
        You must attest your will in order for it to be valid.
  
• To certify in an official capacity.
  
• To supply or be evidence of
        Her fine work attests her ability.
  
• To put under oath.