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

 

mutt

 noun
noun
BrE BrE//mʌt//
 
; NAmE NAmE//mʌt//
 
(informal, especially North American English) Domesticated mammals
 
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a dog, especially one that is not of a particular breed synonym mongrel See related entries: Domesticated mammals Word Origin late 19th cent.: abbreviation of muttonhead.
See the Oxford Advanced American Dictionary entry: mutt

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