WordReference Random House Unabridged Dictionary of American English © 2025
fast•ball
(fast′bôl′, fäst′-),USA pronunciation n. [Baseball.]
- Sporta pitch thrown at or near a pitcher's maximum velocity.
- fast1 + ball1 1910–15
'fastball' also found in these entries (note: many are not synonyms or translations):
brushback
- change of pace
- fireballer
- foul
- mustard
- outside
- split-fingered fastball
- tee
- toe