Source : Webster's Revised Unabridged Dictionary (1913)

Illusionist \Il*lu"sion*ist\, n.
   One given to illusion; a visionary dreamer.

Source : WordNet®

illusionist
     n 1: a person with unusual powers of foresight [syn: {visionary},
           {seer}]
     2: someone who performs magic tricks to amuse an audience [syn:
         {magician}, {prestidigitator}, {conjurer}, {conjuror}]