'fastball' definitions:
Definition of 'fastball'
(from WordNet)
Definition of 'fastball'
From: GCIDE
- fastball \fast"ball`\ n. (Baseball) a baseball thrown with maximum velocity.
- Syn: heater, smoke, hummer, bullet. [WordNet 1.5]
Synonyms of 'fastball'
From: Moby Thesaurus