Dictionary definition · mask
noun
- a covering to disguise or conceal the face
- activity that tries to conceal something"no mask could conceal his ignorance"
- a party of guests wearing costumes and masks
- a protective covering worn over the face
verb
- hide under a false appearance"He masked his disappointment"
- put a mask on or cover with a mask"Mask the children for Halloween"
- make unrecognizable"The herb masks the garlic taste"
- cover with a sauce"mask the meat"
- shield from light
Source: Open English WordNet (CC BY 4.0).