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A pitch thrown at the pitcher's maximum speed.
(Baseball) baseball a ball pitched at the pitcher's top speed
a baseball pitch thrown at or near a pitcher's maximum velocity.
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|Noun||1.||fastball - (baseball) a pitch thrown with maximum velocity; "he swung late on the fastball"; "he showed batters nothing but smoke"|
slider - a fastball that curves slightly away from the side from which it was thrown
baseball, baseball game - a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs; "he played baseball in high school"; "there was a baseball game on every empty lot"; "there was a desire for National League ball in the area"; "play ball!"