Definition of triple-crown in English English dictionary
unofficial championship title for player who heads the league in batting average and home runs and runs batted in of a horse that has won the Kentucky Derby and the Belmont Stakes and the Preakness Stakes races
The feat of leading one's league in three key statistical categories—batting average, home runs, and RBI for hitters; wins, strikeouts, and ERA for pitchers
The three greatest thoroughbred races of the year restricted to three-year-olds: the 2,000 Guineas Stakes, Derby Stakes (aka "Epsom Derby"), and St. Leger Stakes
a title for winning all three of a set of important events in various sports. In British horse racing, it is especially for winning the St Leger, the Derby, and the Two Thousand Guineas. In US horse racing, it is especially for winning the Preakness, the Belmont Stakes, and the Kentucky Derby. In Rugby Union, the Triple Crown is for beating all three of the other home countries. In U.S. horse racing, an unofficial championship attributed to a Thoroughbred horse that in a single season wins the Kentucky Derby, the Preakness Stakes, and the Belmont Stakes. First won in 1919 by Sir Barton, it has since been won 10 times, most recently by Secretariat (1973), Seattle Slew (1977), and Affirmed (1978)
(baseball) an unofficial title won by a batter who leads the league in hitting average and runs batted in and home runs (horse racing) a title won by a horse that can win the Kentucky Derby and the Belmont Stakes and the Preakness