au·to·graph / ˈôtəˌgraf/ • n. 1. a signature, esp. that of a celebrity written as a memento for an admirer.2. a manuscript or musical score in the author's or musician's own handwriting. ∎  a person's handwriting.• v. [tr.] (of a celebrity) write one's signature on (something); sign: the whole team autographed a shirt for him | [as adj.] (autographed) an autographed photo. • adj. written in the author's own handwriting: an autograph manuscript. ∎  (of a painting or sculpture) done by the artist, not by a copier.

autograph author's own manuscript XVII; signature XVIII. — F. autographe or L. autographum — Gr. autógraphon; see AUTO-, -GRAPH.
Hence vb. XIX.