Definition of fastball in English:

fastball

Syllabification: fast·ball
Pronunciation: /ˈfas(t)ˌbôl
 
/

noun

1A baseball pitch thrown at or near a pitcher’s maximum speed.
More example sentences
  • He might throw more pitches in the bullpen or throw more fastballs in the first inning.
  • He throws a low 90s fastball and mixes it with a big-league curve.
  • He also throws a split-finger fastball that serves as a changeup and occasionally a cutter.
1.1 another term for fast-pitch softball.

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