Function: noun
Date: circa 1897
1 : an unofficial title in horse racing representing the championship achieved by a horse that wins the three classic races for a designated category
2 : the unofficial title signifying the achievement of a baseball player who at the end of a season leads the league in batting average, home runs, and runs batted in
3 often not capitalized : a set of three noteworthy awards, wins, or achievements in a particular field