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

 

hyena

 noun
(also hyaena)noun
BrE BrE//haɪˈiːnə//
 
; NAmE NAmE//haɪˈiːnə//
 
Wild mammals
 
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a wild animal like a dog, that eats the meat of animals that are already dead and has a cry like a human laugh. Hyenas live in Africa and Asia. See related entries: Wild mammals Word Origin Middle English: via Latin from Greek huaina, feminine of hus ‘pig’ (the transference of the term probably being because the animal's mane was thought to resemble a hog's bristles).
See the Oxford Advanced American Dictionary entry: hyena