exceptional

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"

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?"

deviating widely from a norm of physical or mental ability; used especially of children below normal in intelligence; "special educational provisions for exceptional children"