triple crown

Short definition from Wiktionary

Noun

1. 1
   The three-tiered tiara formerly worn by Popes.
2. 2
   An award representing victory in three events, especially in horse-racing.
3. 3
   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
4. 4
   The three grandest or oldest open championships of the year
5. 5
   The three grandest or oldest open championships of the year: The U.S. Open, British Open, Canadian Open
6. 6
   The three greatest thoroughbred races of the year restricted to three-year-olds: the Kentucky Derby, Preakness Stakes, and Belmont Stakes
7. 7
   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
8. 8
   The three greatest thoroughbred races of the year restricted to three-year-olds: the Queen's Plate, Prince of Wales Stakes, and Breeders' Stakes
9. 9
   Victory by one of the Home Nations — England, Ireland, Scotland, Wales — over the other three in the annual Six Nations Championship.
10. 10
    Victory by a driver at the three grandest car races in the world, the Indianapolis 500, 24-Hours of Le Mans, Monaco Grand Prix; usually defined as a career achievement and not a season or calendar year achievement