Source : Webster's Revised Unabridged Dictionary (1913)

Smiler \Smil"er\, n.
   One who smiles. --Tennyson.

Source : WordNet®

smiler
     n 1: a person who smiles
     2: the human face (`kisser' and `smiler' and `mug' are informal
        terms for `face' and `phiz' is British) [syn: {countenance},
         {physiognomy}, {phiz}, {visage}, {kisser}, {mug}]