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Pronunciation: mask


  1. Any of a variety of disease states or disorders that cause alteration or discoloration of the skin of the face.
  2. The expressionless appearance seen in association with certain diseases; Parkinson facies.
  3. A facial bandage.
  4. A shield designed to cover the mouth and nose for maintenance of antiseptic conditions.
  5. A device designed to cover the mouth and nose for administration of inhalation anesthetics, oxygen, or other gases.
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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.