English

Definition of fastball noun from the Oxford Advanced Learner's Dictionary

 

fastball

 noun
noun
BrE BrE//ˈfɑːstbɔːl//
 
; NAmE NAmE//ˈfæstbɔːl//
 
Baseball
 
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(in baseball) a ball that is thrown at the pitcher’s fastest speed See related entries: Baseball
See the Oxford Advanced American Dictionary entry: fastball