Definitions
1.nounA cover, or partial cover, for the face, used for disguise or protection."a dancer's mask; a fencer's mask; a ball player's mask"
2.nounThat which disguises; a pretext or subterfuge.
3.nounA festive entertainment of dancing or other diversions, where all wear masks; a masquerade
4.nounA person wearing a mask.
5.nounA dramatic performance, formerly in vogue, in which the actors wore masks and represented mythical or allegorical characters.
6.nounA grotesque head or face, used to adorn keystones and other prominent parts, to spout water in fountains, and the like
7.noun(fortification) In a permanent fortification, a redoubt which protects the caponiere.
8.noun(fortification) A screen for a battery
9.nounThe lower lip of the larva of a dragonfly, modified so as to form a prehensile organ.
10.noun(Puebloan) A ceremonial object used in Puebloan kachina cults that resembles a Euro-American mask. (The term is objected to as an appropriate translation by Puebloan peoples as it emphasizes imitation but ignores power and representational intent.)
11.nounA pattern of bits used in bitwise operations; bitmask.
12.nounA two-color (black and white) bitmap generated from an image, used to create transparency in the image.
13.nounThe head of a fox, shown face-on and cut off immediately behind the ears.
14.verbTo cover (the face or something else), in order to conceal the identity or protect against injury; to cover with a mask or visor.
15.verbTo disguise; to cover; to hide.
16.verbTo conceal; also, to intervene in the line of.
17.verbTo cover or keep in check."to mask a body of troops or a fortess by a superior force, while some hostile evolution is being carried out"
18.verbTo take part as a masker in a masquerade
19.verbTo wear a mask; to be disguised in any way
20.verbTo cover or shield a part of a design or picture in order to prevent reproduction or to safeguard the surface from the colors used when working with an air brush or painting
21.verbTo set or unset (certain bits, or binary digits, within a value) by means of a bitmask.
22.verbTo disable (an interrupt, etc.) by setting or unsetting the associated bit.