mask mask /ˈmæsk/

noun

1. () Activity that tries to conceal something  ( mask )
   activity that tries to conceal something
    No mask could conceal his ignorance
   no mask could conceal his ignorance
    They moved in under a mask of friendship
   they moved in under a mask of friendship
   
2. () A covering to disguise or conceal the face  ( mask )
   a covering to disguise or conceal the face
    Due to the pandemic, everyone was advised to wear a mask in public places.
   Due to the pandemic, everyone was advised to wear a mask in public places.
   
   
3. A protective covering worn over the face  ( mask )
   a protective covering worn over the face
    The fencer put on his protective mask before beginning the match
   The fencer put on his protective mask before beginning the match
   
4. A party of guests wearing costumes and masks  ( mask , masque , masquerade , masquerade party )
   a party of guests wearing costumes and masks
   
   

verb

1. () Put a mask on or cover with a mask  ( mask )
   put a mask on or cover with a mask
    Mask the children for Halloween
   Mask the children for Halloween
   
2. () Hide under a false appearance  ( cloak , dissemble , mask )
   hide under a false appearance
    He masked his disappointment
   He masked his disappointment
   
3. (photography) shield from light  ( block out , mask )
   (photography) shield from light
   
4. (cooking) cover with a sauce  ( mask )
   (cooking) cover with a sauce
    Mask the meat
   mask the meat
   
5. Make unrecognizable  ( mask , disguise )
   make unrecognizable
    The herb masks the garlic taste
   The herb masks the garlic taste
    We disguised our faces before robbing the bank
   We disguised our faces before robbing the bank