English

Definition of punchline noun from the Oxford Advanced Learner's Dictionary

 

punchline

 noun
noun
BrE BrE//ˈpʌntʃlaɪn//
 
; NAmE NAmE//ˈpʌntʃlaɪn//
 
(also North American English, informal tag line)
 
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the last few words of a joke that make it funny He forgot the punchline and the joke fell flat.