Definitions for exactaɪgˈzæk tə
Random House Webster's College Dictionary
a type of bet, esp. on horse races, in which the bettor must select the first- and second-place finishers in exact order.
Category: Games, Sport
Origin of exacta:
1960–65; ellipsis of AmerSp quiniela exacta exact quinella
a bet that you can pick the first and second finishers in the right order