| Adj. | 1.triple-crown - of a horse that has won the Kentucky Derby and the Belmont Stakes and the Preakness raceshorse racing - the sport of racing horsessuccessful - having succeeded or being marked by a favorable outcome; "a successful architect"; "a successful business venture" | | 2. triple-crown - unofficial championship title for player who heads the league in batting average and home runs and runs batted inbaseball, baseball game - a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs; "he played baseball in high school"; "there was a baseball game on every empty lot"; "there was a desire for National League ball in the area"; "play ball!"successful - having succeeded or being marked by a favorable outcome; "a successful architect"; "a successful business venture" |