unusual in WordNet English dictionary

1. being definitely out of the ordinary and unexpected; slightly odd or even a bit weird
   "a strange exaltation that was indefinable"; "a strange fantastical mind"; "what a strange sense of humor she has"
   strange  unusual 
   
2. not usual or common or ordinary
   "a scene of unusual beauty"; "a man of unusual ability"; "cruel and unusual punishment"; "an unusual meteorite"
   unusual 
   
3. not commonly encountered
   "two-career families are no longer unusual"
   unusual