English

Definition of quack verb from the Oxford Advanced Learner's Dictionary

 

quack

 verb
verb
BrE BrE//kwæk//
 
; NAmE NAmE//kwæk//
 
Verb Forms present simple I / you / we / they quack
BrE BrE//kwæk//
 
; NAmE NAmE//kwæk//
 
he / she / it quacks
BrE BrE//kwæks//
 
; NAmE NAmE//kwæks//
 
past simple quacked
BrE BrE//kwækt//
 
; NAmE NAmE//kwækt//
 
past participle quacked
BrE BrE//kwækt//
 
; NAmE NAmE//kwækt//
 
-ing form quacking
BrE BrE//ˈkwækɪŋ//
 
; NAmE NAmE//ˈkwækɪŋ//
 
 
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[intransitive] when a duck quacks, it makes the noise that is typical of ducks Word Originverb mid 16th cent. (as a verb): imitative.
See the Oxford Advanced American Dictionary entry: quack

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