triple-crown (Adjective) — (horse racing) of a horse that has won the Kentucky Derby and the Belmont Stakes and the Preakness races.
triple-crown (Adjective) — (baseball) unofficial championship title for player who heads the league in batting average and home runs and runs batted in.
triple-crown (Noun) — (horse racing) a title won by a horse that can win the Kentucky Derby and the Belmont Stakes and the Preakness.
triple-crown (Noun) — (baseball) an unofficial title won by a batter who leads the league in hitting average, runs batted in, and home runs.