American English

Definition of mask noun from the Oxford Advanced American Dictionary



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  1. 1a covering for part or all of the face, worn to hide or protect it a gas/surgical mask The robbers were wearing stocking masks. He was carrying a baseball bat, gloves, and a catcher's mask. see also oxygen mask
  2. 2something that covers your face and has another face painted on it The kids were all wearing Halloween masks. see also death mask
  3. 3a thick cream made of various substances that you put on your face and neck in order to improve the quality of your skin a facial mask
  4. 4[usually singular] a manner or an expression that hides your true character or feelings He longed to throw off the mask of respectability. Her face was a cold blank mask.
See the Oxford Advanced Learner's Dictionary entry: mask