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

 

jackrabbit

 noun
noun
BrE BrE//ˈdʒækræbɪt//
 
; NAmE NAmE//ˈdʒækræbɪt//
 
Wild mammals
 
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a large N American hare (= an animal like a large rabbit ) with very long ears See related entries: Wild mammals Word Origin mid 19th cent.: abbreviation of jackass-rabbit, because of its long ears.
See the Oxford Advanced American Dictionary entry: jackrabbit