home m Bea De Giacomo mask [mask, mahsk] –noun 1. a covering for all or part of the face, worn to conceal one's identity. 2. a grotesque or humorous false face worn at a carnival, masquerade, etc.: Halloween masks. 3. anything that disguises or conceals; disguise; pretense: His politeness is a mask for his fundamentally malicious personality. 4. a likeness of a face, as one molded on the face in plaster. –verb (used without object) 5. to put on a mask; disguise oneself. a b c d e f g h i j k l m n o p q r s t u v w x y z magic mast mask melon meadow meat memorial mermaid merchandise metal milky mir-mz midnight