Triple-crown is a phrase that originated in the world of horse racing and refers to a horse who has won three of the most prestigious races in the sport. However, there are several synonyms that can be used to describe this same feat in other contexts. For example, in baseball, a player who leads the league in batting average, home runs, and runs batted in is said to have won the triple crown. Similarly, in chess, a player who wins the three most significant tournaments in a single year can be said to have won the triple crown of chess. Other phrases used to express this concept include trifecta and hat-trick.