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

 

westerly

 noun
noun
BrE BrE//ˈwestəli//
 
; NAmE NAmE//ˈwestərli//
 
Wind
 
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(pl. westerlies) a wind that blows from the west light westerlies See related entries: Wind Word Origin late 15th cent.: from obsolete wester ‘western’ + -ly.
See the Oxford Advanced American Dictionary entry: westerly