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

 

wingspan

 noun
noun
BrE BrE//ˈwɪŋspæn//
 
; NAmE NAmE//ˈwɪŋspæn//
 
 
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the distance between the end of one wing and the end of the other when the wings are fully stretched a bird with a two-foot wingspan the wingspan of a glider
See the Oxford Advanced American Dictionary entry: wingspan