Definition of bison noun from the Oxford Advanced American Dictionary

 

bison

 noun
noun
NAmE//ˈbaɪsn//
 
, NAmE//ˈbaɪzn//
 
(pl. bison)
 
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a large wild animal of the cow family that is covered with hair. The N. American bison is also called a buffalo a herd of bison
See the Oxford Advanced Learner's Dictionary entry: bison