Source : Webster's Revised Unabridged Dictionary (1913)

Portraiture \Por"trai*ture\, v. t.
   To represent by a portrait, or as by a portrait; to portray.
   [R.] --Shaftesbury.

Portraiture \Por"trai*ture\ (?; 135), n. [F. portraiture.]
   1. A portrait; a likeness; a painted resemblance; hence, that
      which is copied from some example or model.

            For, by the image of my cause, I see The portraiture
            of his.                               --Shak.

            Divinity maketh the love of ourselves the pattern;
            the love of our neighbors but the portraiture.
                                                  --Bacon.

   2. Pictures, collectively; painting. [Obs.] --Chaucer.

   3. The art or practice of making portraits. --Walpole.

Source : WordNet®

portraiture
     n 1: a word picture of a person's appearance and character [syn:
          {portrayal}, {portrait}]
     2: the activity of making portraits