base·ball 
(bāsbôl′)
(bāsbôl′)n.
1.
a. A game played with a bat and ball by two opposing teams of nine players, each team playing alternately in the field and at bat, the players at bat having to run a course of four bases laid out in a diamond pattern in order to score.
b. The ball that is used in this game.
2. A game of darts in which the players attempt to score points by throwing the darts at a target laid out in the form of a baseball diamond.