American English

Definition of rat-a-tat noun from the Oxford Advanced American Dictionary

 

rat-a-tat

 noun
noun
NAmE//ˌræt̮ ə ˈtæt//
 
(also rat-a-tat-tat, rat-tat-tat) [singular]
 
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a series of short loud sounds like those made by knocking on a door or shooting bullets one after the other quickly the rat-a-tat-tat of drums