1. n. A 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. n. That which disguises; a pretext or subterfuge.
3. n. A festive entertainment of dancing or other diversions, where all wear masks; a masquerade
4. n. A person wearing a mask.
5. n. (obsolete) A dramatic performance, formerly in vogue, in which the actors wore masks and represented mythical or allegorical characters.
6. n. (architecture) A grotesque head or face, used to adorn keystones and other prominent parts, to spout water in fountains, and the like; -- called also mascaron.
7. n. (fortification) In a permanent fortification, a redoubt which protects the caponiere.
8. n. (fortification) A screen for a battery
9. n. (zoology) The lower lip of the larva of a dragonfly, modified so as to form a prehensile organ.
10. n. (Puebloan, anthropology) A ceremonial object used in Puebloan kachina cults that resembles a Euro-American masks. (The term is objected as an appropriate translation by Puebloan peoples as it emphasiz
11. n. (computing, programming) A pattern of bits used in bitwise operations; bitmask.
12. n. (computer graphics) A two-color (black and white) bitmap generated from an image, used to create transparency in the image.
13. n. (heraldiccharge) The head of a fox, shown face-on and cut off immediately behind the ears.
14. v. To cover, as the face, by way of concealment or defense against injury; to conceal with a mask or visor.
15. v. To disguise; to cover; to hide.
16. v. (transitive, military) To conceal; also, to intervene in the line of.
17. v. (transitive, military) To 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. v. (intransitive) To take part as a masker in a masquerade
19. v. (intransitive) To wear a mask; to be disguised in any way
20. v. (transitive, computing) To set or unset (certain bits, or binary digits, within a value) by means of a bitmask.
21. v. (transitive, computing) To disable (an interrupt, etc.) by unsetting the associated bit.
22. n. A mesh.
23. n. (UK dialectal, Scotland) The mesh of a net; a net; net-bag.
24. n. (UK dialectal) Mash.
25. v. (transitive, UK dialectal) To mash.
26. v. (transitive, UK dialectal) (brewing) To mix malt with hot water to yield wort.
27. v. (transitive, Scotland dialectal) To be infused or steeped.
28. v. (UK dialectal, Scotland) To prepare tea in a teapot; alternative to brew.
29. v. (transitive, UK dialectal) To bewilder; confuse.
