mask - definition and synonyms

 
 
noun [countable] 

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/mɑːsk/
singularmask
pluralmasks
  1. 1
    something that you wear to cover part or all of your face in order to protect it from something harmful such as poisonous gas, bacteria, or smoke
    1. a.
      something that you wear to cover part or all of your face in order to hide who you are or for decoration

      They were robbed by a man wearing a ski mask.

  2. 2
    an expression on someone’s face that hides their true feelings, thoughts, or character

    His features hardened into an expressionless mask.

    He let the mask slip a little as his trust grew.