1. A covering worn on the face to conceal one's identity, as:
2. A covering, as of cloth, that has openings for the eyes, entirely or partly conceals the face, and is worn especially at a masquerade ball.
3. A grotesque or comical representation of a face, worn especially to frighten or amuse, as at halloween.
4. A facial covering worn for ritual.
5. A figure of a head worn by actors in greek and roman drama to identify a character or trait and to amplify the voice.
6. A protective covering for the face or head.
7. A gas mask.
8. A usually rubber frame forming a watertight seal around the eyes and nose and containing a transparent covering for use in seeing underwater.
9. A covering for the nose and mouth that is used for inhaling oxygen or an anesthetic.
10. A covering worn over the nose and mouth, as by a surgeon or dentist, to prevent infection.
11. A mold of a person's face, often made after death.
12. an often grotesque representation of a head and face, used for ornamentation.
13. the face or facial markings of certain animals, such as foxes or dogs.
14. A face having a blank, fixed, or enigmatic expression.
15. something, often a trait, that disguises or conceals: "If ever I saw misery under a mask, it was on her face” ( Erskine Childers).
16. A natural or artificial feature of terrain that conceals and protects military forces or installations.
17. an opaque border or pattern placed between a source of light and a photosensitive surface to prevent exposure of specified portions of the surface.
18. the translucent border framing a television picture tube and screen.
19. computer science A pattern of characters, bits, or bytes used to control the elimination or retention of another pattern of characters, bits, or bytes.
20. A cosmetic preparation that is applied to the face and allowed to dry before being removed, used especially for cleansing and tightening the skin.
21. variant of masque.
22. A person wearing a mask.
23. to cover with a decorative or protective mask.
24. to make indistinct or blurred to the senses: spices that mask the strong flavor of the meat.
25. to cover in order to conceal, protect, or disguise. see synonyms at disguise.
26. to block the view of: undergrowth masked the entrance to the cave.
27. to cover (a part of a photographic film) by the application of an opaque border.
28. chemistry to prevent (an atom or a group of atoms) from taking part in a normal reaction.
29. to put on a mask, especially for a masquerade ball.
30. to conceal one's real personality, character, or intentions.

1. A mesh.
2. the mesh of a net; a net; net-bag.
3. mash.
4. to mash.
5. (brewing) to mix malt with hot water to yield wort.
6. A cover, or partial cover, for the face, used for disguise or protection.
7. that which disguises; a pretext or subterfuge.
8. A festive entertainment of dancing or other diversions, where all wear masks; a masquerade; hence, a revel; a frolic; a delusive show - francis bacon
9. A dramatic performance, formerly in vogue, in which the actors wore masks and represented mythical or allegorical characters.
10. A grotesque head or face, used to adorn keystones and other prominent parts, to spout water in fountains, and the like; -- called also mascaron.
11. in a permanent fortification, a redoubt which protects the caponiere.
12. A screen for a battery
13. the lower lip of the larva of a dragonfly, modified so as to form a prehensile organ.
14. 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 emphasizes imitation but ignores power and representational intent.)
15. A pattern of bits used in bitwise operations; bitmask.
16. A two-color (black and white) bitmap generated from an image, used to create transparency in the image.
17. to cover, as the face, by way of concealment or defense against injury; to conceal with a mask or visor.
18. to disguise; to cover; to hide.
19. to conceal; also, to intervene in the line of.
20. to cover or keep in check.
21. to take part as a masker in a masquerade
22. to wear a mask; to be disguised in any way
23. to bewilder; confuse.

1. A cover, or partial cover, for the face, used for disguise or protection
2. that which disguises; a pretext or subterfuge.
3. A festive entertainment of dancing or other diversions, where all wear masks; a masquerade; hence, a revel; a frolic; a delusive show.
4. A dramatic performance, formerly in vogue, in which the actors wore masks and represented mythical or allegorical characters.
5. A grotesque head or face, used to adorn keystones and other prominent parts, to spout water in fountains, and the like; -- called also mascaron.
6.
7. in a permanent fortification, a redoubt which protects the caponiere.
8. A screen for a battery.
9. the lower lip of the larva of a dragon fly, modified so as to form a prehensile organ.
10. A person wearing a mask; a masker.
11. the head or face of a fox.
12. to take part as a masker in a masquerade.
13. to wear a mask; to be disguised in any way.
14. to cover, as the face, by way of concealment or defense against injury; to conceal with a mask or visor.
15. to disguise; to cover; to hide.
16.
17. to conceal; also, to intervene in the line of.
18. to cover or keep in check.

1. to steep; infuse.
2. to be infused; yield to the process of infusion: as, the tea is masking.
3. an obsolete form of mesh.
4. to cover the face of, wholly or in part, for concealment, disguise, or defense; conceal with a mask or vizor.
5. to cover with a disguising costume of any kind, as in a masquerade.
6. to disguise; conceal; screen from view by something interposed.
7.
8. to play a part in a masquerade; go about in masquerade.
9. to put on a mask; disguise one's self in any way.
10. A cover for the face with apertures for seeing and breathing; especially, such a cover, usually of silk or velvet, as worn at masquerades; a false face; a vizor.
11. A festive entertainment or performance in which the participants are masked or wear a disguising costume; a body of maskers; a masquerade; a revel.
12. A form of histrionic spectacle, much in vogue during the sixteenth and seventeenth centuries.
13. anything used or practised for disguise or concealment; anything interposed as a safeguard against observation, discovery, or disclosure; a screen or disguise; a subterfuge, pretext, or shift: as, a mask of brush in front of a battery; suffering under a mask of gaiety.
14. A person wearing a mask.
15. in sculpture: A representation in any material, as marble, metal, terra-cotta, or wax, of the face only of a figure, or of the face with the front of the neck and upper part of the chest: as, a mask of jupiter; comic and tragic masks.
16. an impression or cast of the face of a person, living or dead, made by covering the face with some plastic or semi-fluid substance, as plaster of paris, which is removed when it has become sufficiently set.
17. in architecture, a representation of a face, generally grotesque, employed to fill and adorn vacant places, as in corbels, friezes, panels of doors, keys of arches, etc.
18. in surgery, a linen bandage with apertures for the eyes, nose, and mouth, applied over the face in cases of burns, scalds, erysipelas, etc.
19. in zoology: A formation or coloration of the head like a mask; a hood or capistrum. see masked.
20. specifically, in entomology, the greatly enlarged labium or lower lip of the larval and pupal dragon-fly.
21. in zoology: the skin of the forehead and upper part of the face of any quadruped, taken off at about the level of the eyes.
22. in base-ball, a protection for the face worn by the catcher. see cage, 8.

1. a protective covering worn over the face
2. activity that tries to conceal something
3. make unrecognizable
4. shield from light
5. cover with a sauce
6. hide under a false appearance
7. put a mask on or cover with a mask
8. a party of guests wearing costumes and masks
9. a covering to disguise or conceal the face