Definition of mask verb from the Oxford Advanced Learner's Dictionary

 

mask

 verb
verb
BrE BrE//mɑːsk//
 
; NAmE NAmE//mæsk//
 
Verb Forms present simple I / you / we / they mask
BrE BrE//mɑːsk//
 
; NAmE NAmE//mæsk//
 
he / she / it masks
BrE BrE//mɑːsks//
 
; NAmE NAmE//mæsks//
 
past simple masked
BrE BrE//mɑːskt//
 
; NAmE NAmE//mæskt//
 
past participle masked
BrE BrE//mɑːskt//
 
; NAmE NAmE//mæskt//
 
-ing form masking
BrE BrE//ˈmɑːskɪŋ//
 
; NAmE NAmE//ˈmæskɪŋ//
 
 
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mask something to hide a feeling, smell, fact, etc. so that it cannot be easily seen or noticed synonym disguise, veil She masked her anger with a smile. Synonymshideconceal cover disguise mask camouflageThese words all mean to put or keep somebody/​something in a place where they/​it cannot be seen or found, or to keep the truth or your feelings secret.hide to put or keep somebody/​something in a place where they/​it cannot be seen or found; to keep something secret, especially your feelings:He hid the letter in a drawer. She managed to hide her disappointment.conceal (formal) to hide somebody/​something; to keep something secret:The paintings were concealed beneath a thick layer of plaster. Tim could barely conceal his disappointment. When it is being used to talk about emotions, conceal is often used in negative statements. cover to place something over or in front of something in order to hide it:She covered her face with her hands.disguise to hide or change the nature of something, so that it cannot be recognized:He tried to disguise his accent.mask to hide a feeling, smell, fact, etc. so that it cannot be easily seen or noticed:She masked her anger with a smile.camouflage to hide somebody/​something by making them/​it look like the things around, or like something else:The soldiers camouflaged themselves with leaves and twigs.Patterns to hide/​conceal/​disguise/​mask/​camouflage something behind something to hide/​conceal something under something to hide/​conceal something from somebody to hide/​conceal/​disguise/​mask the truth/​the fact that… to hide/​conceal/​disguise/​mask your feelings Word Origin mid 16th cent.: from French masque, from Italian maschera, mascara, probably from medieval Latin masca ‘witch, spectre’, but influenced by Arabic mask̲ara ‘buffoon’.Extra examples Varnish tends to mask the natural grain of the wood. Wood stains provide good protection but tend to mask the natural grain of the wood. Spices were used to mask the unpleasant taste of the meat.
See the Oxford Advanced American Dictionary entry: mask