English

Definition of hard hat noun from the Oxford Advanced Learner's Dictionary

 

hard hat

 noun
noun
BrE BrE//ˌhɑːd ˈhæt//
 
; NAmE NAmE//ˌhɑːrd ˈhæt//
 
Construction
 
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a hat worn by building workers, etc. to protect their heads See related entries: Construction
See the Oxford Advanced American Dictionary entry: hard hat