fastball

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fastball /ˈfæstˌbɑːl/ Brit /ˈfɑːstˌbɑːl/ noun
plural fastballs
fastball
/ˈfæstˌbɑːl/ Brit /ˈfɑːstˌbɑːl/
noun
plural fastballs
Learner's definition of FASTBALL
[count] baseball
: a pitch that is thrown at full speed : a very fast pitch