The Collaborative International Dictionary of English v.0.48:

Portrait \Por"trait\, n. [F., originally p. p. of portraire to
   portray. See Portray.]
   1. The likeness of a person, painted, drawn, or engraved;
      commonly, a representation of the human face painted from
      real life.
      [1913 Webster]

            In portraits, the grace, and, we may add, the
            likeness, consists more in the general air than in
            the exact similitude of every feature. --Sir J.
                                                  Reynolds.
      [1913 Webster]

   Note: The meaning of the word is sometimes extended so as to
         include a photographic likeness.
         [1913 Webster]

   2. Hence, any graphic or vivid delineation or description of
      a person; as, a portrait in words.
      [1913 Webster]

   Portrait bust, or Portrait statue, a bust or statue
      representing the actual features or person of an
      individual; -- in distinction from an ideal bust or
      statue.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Portrait \Por"trait\, v. t.
   To portray; to draw. [Obs.] --Spenser.
   [1913 Webster]

WordNet (r) 3.0 (2006):

portrait
    n 1: a word picture of a person's appearance and character [syn:
         portrayal, portraiture, portrait]
    2: any likeness of a person, in any medium; "the photographer
       made excellent portraits" [syn: portrait, portrayal]