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Definition of crash helmet noun from the Oxford Advanced Learner's Dictionary

crash helmet

noun
 
/ˈkræʃ helmɪt/
 
/ˈkræʃ helmɪt/
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  1. a hat made of very strong material and worn to protect the head when riding a motorcycle or driving a racing carTopics Clothes and Fashionc1, Transport by car or lorryc1
See crash helmet in the Oxford Advanced American Dictionary
trait
noun
 
 
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