Source : Webster's Revised Unabridged Dictionary (1913)

Winner \Win"ner\, n.
   One who wins, or gains by success in competition, contest, or
   gaming.

Source : WordNet®

winner
     n 1: the contestant who wins the contest [syn: {victor}] [ant: {loser}]
     2: a gambler who wins a bet [ant: {loser}]
     3: a person with a record of successes; "his son would never be
        the achiever that his father was"; "only winners need
        apply"; "if you want to be a success you have to dress
        like a success" [syn: {achiever}, {success}, {succeeder}]
        [ant: {failure}]