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

 

penguin

 noun
noun
BrE BrE//ˈpeŋɡwɪn//
 
; NAmE NAmE//ˈpeŋɡwɪn//
 
Birds
 
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a black and white bird that lives in the Antarctic. Penguins cannot fly but use their wings for swimming. There are several types of penguin, some of them very large but some of them quite small. See related entries: Birds Word Origin late 16th cent. (originally denoting the great auk): of unknown origin.