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

 

bronco

 noun
noun
BrE BrE//ˈbrɒŋkəʊ//
 
; NAmE NAmE//ˈbrɑːŋkoʊ//
 
(pl. broncos) Equine sports
 
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a wild horse of the western US a bucking bronco in the rodeo See related entries: Equine sports Word Origin mid 19th cent.: from Spanish, literally ‘rough, rude’.
See the Oxford Advanced American Dictionary entry: bronco