mask

1 mask /ˈmæsk/ Brit /ˈmɑːsk/ noun
plural masks
1 mask
/ˈmæsk/ Brit /ˈmɑːsk/
noun
plural masks
Britannica Dictionary definition of MASK
[count]
1 
: a covering for your face or for part of your face: such as
a  : a covering used to hide or disguise your face
b  : a covering used to protect your face or cover your mouth
— see picture at scuba diving; see also face mask, gas mask, oxygen mask, ski mask
2 
: a way of appearing or behaving that is not true or real — usually singular
2 mask /ˈmæsk/ Brit /ˈmɑːsk/ verb
masks; masked; masking
2 mask
/ˈmæsk/ Brit /ˈmɑːsk/
verb
masks; masked; masking
Britannica Dictionary definition of MASK
[+ object]
1 
: to hide (something) from sight
2 
: to keep (something) from being known or noticed