mask

American  

[mask, mahsk] / mæsk, mɑsk /

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. 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.

4. anything that disguises or conceals; disguise; pretense.

   His politeness is a mask for his fundamentally malicious personality.

5. a likeness of a face, as one molded on the face in plaster.

6. a covering of wire, gauze, etc., to protect the face, as from splinters, dust, or a pitched ball.

7. gas mask.

8. any protective covering for the face or head.

9. any protective covering, as paper, cardboard, plastic, or the like, used for masking an area of something, as of a photograph or window.

10. the dark shading on the muzzle of certain dogs.

11. a representation of a face or head, generally grotesque, used as an architectural ornament or as a decorative device in weaponry, furniture, etc.

12. a person wearing a mask; masker.

13. masque.

14. Also a cosmetic cream, gel, paste, or the like, that is applied to the face and allowed to remain for a short time before being removed and is used for tightening, cleansing, refreshing, or lubricating the skin.

15. a piece of cloth, silk, or plastic material covering the face of an actor to symbolize the character being represented: used in Greek and Roman drama and in some modern plays.

16. the face or head, as of a fox.

17. Electronics. a type of stencil applied to the surface of a semiconductor to permit selective etching or deposition: used in the manufacture of integrated circuits by photolithography.

18. Fortification. a screen, as of earth or brush, for concealing or protecting a battery or any military operation.

19. Also called braker.  Shipbuilding. a sliding timber construction braced against the stern of a hull being launched to keep it from entering the water too rapidly.

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verb (used with object)

1. to disguise or conceal; hide; dissemble.

   to mask one's intentions.

   Synonyms:

   cover, cloak, screen, veil

2. to cover or conceal with a mask.

3. to cover or shield a part of (a design, picture, etc.) in order to prevent reproduction or to protect the surface from the colors used, as in working with an air brush or in painting.

4. Fortification. to conceal (a battery or any military operation) from the enemy.

5. to hinder, as an army, from conducting an operation.

verb (used without object)

1. to put on a mask; disguise oneself.

mask British  

/ mɑːsk /

noun

1. any covering for the whole or a part of the face worn for amusement, protection, disguise, etc

2. a fact, action, etc, that conceals something

   his talk was a mask for his ignorance

3. another name for masquerade

4. a likeness of a face or head, either sculpted or moulded, such as a death mask

5. an image of a face worn by an actor, esp in ancient Greek and Roman drama, in order to symbolize the character being portrayed

6. a variant spelling of masque

7. surgery a sterile gauze covering for the nose and mouth worn esp during operations to minimize the spread of germs

8. sport a protective covering for the face worn for fencing, ice hockey, etc

9. a carving in the form of a face or head, used as an ornament

10. a natural land feature or artificial object which conceals troops, etc, from view

11. a device placed over the nose and mouth to facilitate or prevent inhalation of a gas

12. photog a shield of paper, paint, etc, placed over an area of unexposed photographic surface to stop light falling on it

13. electronics a thin sheet of material from which a pattern has been cut, placed over a semiconductor chip so that an integrated circuit can be formed on the exposed areas

14. computing a bit pattern which, by convolution with a second pattern in a logical operation, can be used to isolate a specific subset of the second pattern for examination

15. entomol a large prehensile mouthpart (labium) of the dragonfly larva

16. the face or head of an animal, such as a fox, or the dark coloration of the face of some animals, such as Siamese cats and certain dogs

17. another word for face pack

18. rare a person wearing a mask

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verb

1. to cover with or put on a mask

2. (tr) to conceal; disguise

   to mask an odour

3. (tr) photog to shield a particular area of (an unexposed photographic surface) in order to prevent or reduce the action of light there

4. (tr) to shield a particular area of (a surface to be painted) with masking tape

5. (tr) to cover (cooked food, esp meat) with a savoury sauce or glaze

6. a Scottish variant of mash

Other Word Forms

• masklike adjective

Etymology

Origin of mask

First recorded in 1525–35; from Middle French masque, perhaps directly from Italian maschera “mask, disguise,” from unattested pre-Latin maskara, an extended form of unattested mask-, probably with the original sense “black” (blackening the face being a simple form of disguise); another development of the same base is early Medieval Latin masca “witch, ghost” (also, “mask”); see mascot

Explanation

A mask is a disguise that covers just your face. Your Halloween costume might include a scary monster mask and a furry suit with a tail, or maybe you just wear that for fun. You can wear a mask to conceal your identity, to dress up as a character for a party or holiday, to scare someone, or to make someone laugh. Robbers sometimes wear masks so they can't be identified, and an actor might wear a mask while playing the role of a rabbit in a play. Other masks are useful, including masks that protect patients from germs and masks that keep skiers' faces warm.

Example Sentences

King Tutankhamun’s tomb, containing the pharaoh’s solid-gold inner coffin and death mask.

From The Wall Street Journal • Apr. 16, 2026

That may mask differences in how far the disease has progressed in the brain, Dhamala said.

From MarketWatch • Apr. 13, 2026

That means they mask their identity by flying different flags, turn off their tracking systems to avoid detection, and are unlikely to be fully insured.

From Barron's • Apr. 10, 2026

The following day Lyons was photographed, with his hands bound by cable ties, being led from police headquarters wearing bright orange overalls and a black face mask.

From BBC • Apr. 8, 2026

And as for the beady eyes, in truth, they looked like holes cut out of a mask.

From "The Very, Very Far North" by Dan Bar-el

Related Words

• camouflage
• conceal
• cover-up
• hide
• obscure
• shield
• veil