mask (măsk)

1. A covering for the nose and mouth that is used for inhaling oxygen or an anesthetic.
2. A covering worn over the nose and mouth, as by a surgeon or dentist, to prevent infection.
3. A facial bandage.
4. Something, often a trait, that disguises or conceals.
5. Any of a variety of conditions producing alteration or discoloration of the skin of the face.
6. An expressionless appearance of the face seen in certain diseases, such as Parkinsonism.

1. To cover with a protective mask.
2. To cover in order to conceal, protect, or disguise.