noun
Usage: usually capitalized T&C
1. : an unofficial title in horse racing representing the championship achieved by a horse that wins the three classic races for three year olds:
a. : one in English racing representing the winning of the Two Thousand Guineas, the Derby, and the St. Leger
b. : one in American racing representing the winning of the Kentucky Derby, the Belmont Stakes, and the Preakness Stakes
2. : the unofficial title representing the championship attained by a baseball player who at the end of a single season leads his league in batting average, home runs, and runs batted in