Psychology. obscuring, partially or completely, one sensory process by another, as the dulling of the sense of taste by smoking.
a covering for all or part of the face, worn to conceal one's identity.
a grotesque or humorous false face worn at a carnival, masquerade, etc.: Halloween masks.
Also called swim mask. a device consisting typically of a transparent glass or plastic panel fitted into a flexible rubber gasket that fits snugly around the eyes, over the cheeks, and usually over the nose: used by skin divers.