Source : Webster's Revised Unabridged Dictionary (1913)

Limner \Lim"ner\ (l[i^]m"n[~e]r), n. [F. enlumineur, LL.
   illuminator. See {Limn}, and cf. {Alluminor}.]
   A painter; an artist; esp.:
   (a) One who paints portraits.
   (b) One who illuminates books. [Archaic]

Source : WordNet®

limner
     n : a painter or drawer of portraits [syn: {portraitist}, {portrait
         painter}, {portrayer}]