English

Definition of oxygen mask noun from the Oxford Advanced Learner's Dictionary

 

oxygen mask

 noun
noun
BrE BrE//ˈɒksɪdʒən mɑːsk//
 
; NAmE NAmE//ˈɑːksɪdʒən mæsk//
 
Medical equipment, Parts of a plane
 
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a device placed over the nose and mouth through which a person can breathe oxygen, for example in an aircraft or a hospital See related entries: Medical equipment, Parts of a plane
See the Oxford Advanced American Dictionary entry: oxygen mask