American English

Definition of pitter-patter adverb from the Oxford Advanced American Dictionary

 

pitter-patter

 adverb
adverb
NAmE//ˈpɪt̮ər ˌpæt̮ər//
 
(also pit-a-pat, pitter-pat)
 
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with quick light steps or beats Her heart went pitter-patter.
pitter-patter (also pit-a-pat, pitter-pat) noun [singular]
 
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I could hear the pitter-patter of feet in the corridor.
See the Oxford Advanced Learner's Dictionary entry: pitter-patter