2. To prove authentic; to determine as real and true; as, to authenticate a portrait. Walpole.

AUTHENTICITY
Au`then*tic"i*ty, n. Etym: [Cf. F. authenticité.]

1. The quality of being authentic or of established authority for truth and correctness.

2. Genuineness; the quality of being genuine or not corrupted from the original.

Note: In later writers, especially those on the evidences of Christianity, authenticity is often restricted in its use to the first of the above meanings, and distinguished from qenuineness.

AUTHENTICLY
Au*then"tic*ly, adv.

Defn: Authentically.

AUTHENTICNESS
Au*then"tic*ness, n.

Defn: The quality of being authentic; authenticity. [R.] Hammond.

AUTHENTICS
Au*then"tics, n. (Ciwil Law)