exceptional in WordNet English dictionary

1. surpassing what is common or usual or expected
   "he paid especial attention to her"; "exceptional kindness"; "a matter of particular and unusual importance"; "a special occasion"; "a special reason to confide in her"; "what's so special about the year 2000?"
   especial  exceptional  particular  special 
   
2. far beyond what is usual in magnitude or degree
   "a night of exceeding darkness"; "an exceptional memory"; "olympian efforts to save the city from bankruptcy"; "the young Mozart's prodigious talents"
   exceeding  exceptional  olympian  prodigious  surpassing 
   
3. deviating widely from a norm of physical or mental ability; used especially of children below normal in intelligence
   "special educational provisions for exceptional children"
   exceptional