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

 

axle

 noun
noun
BrE BrE//ˈæksl//
 
; NAmE NAmE//ˈæksl//
 
Parts of a car
 
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a long straight piece of metal that connects a pair of wheels on a vehicle the front/rear axle See related entries: Parts of a car Word Origin Middle English (originally axle-tree): from Old Norse ǫxultré.
See the Oxford Advanced American Dictionary entry: axle