FASTBALL Meaning of FASTBALL in English fast ‧ ball /ˈfɑːstbɔːl $ ˈfæstbɒːl/ BrE AmE noun [countable] a ball that is thrown very hard and quickly towards the ↑ batter in a game of ↑ baseball Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012