Definition of thwack verb from the Oxford Advanced American Dictionary

 

thwack

 verb
verb
NAmE//θwæk//
 
thwack somebody/somethingVerb Forms present simple I / you / we / they thwack
 
he / she / it thwacks
 
past simple thwacked
 
-ing form thwacking
 
 
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to hit someone or something hard, making a short loud sound
the thwack of bat on ball