Meaning of “mask” in the English Dictionary

"mask" in British English

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masknoun [ C ]

uk /mɑːsk/ us /mæsk/

mask noun [ C ] (FACE COVER)

B2 a covering for all or part of the face that protects, hides, or decorates the person wearing it:

a gas mask
a surgical mask
The bank robbers wore masks throughout the raid.

More examples

mask noun [ C ] (APPEARANCE/ BEHAVIOUR)

appearance or behaviour that hides the truth:

The newspaper revealed the sordid truth behind his mask of respectability.

Idiom(s)

maskverb [ T ]

uk /mɑːsk/ us /mæsk/

(Definition of “mask” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"mask" in American English

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masknoun [ C ]

us /mæsk/

a covering for all or part of the face, worn for protection or to hide the face:

a gas mask
an exhibit of African masks
The children all wore Halloween masks that were supposed to frighten us.

maskverb [ T ]

us /mæsk/

to prevent something from being seen or noticed:

The tastelessness of the meat was masked by a heavy gravy.

(Definition of “mask” from the Cambridge Academic Content Dictionary © Cambridge University Press)