#1 mask n. a covering to disguise or conceal the face. wn
#2 mask v. [dissemble, cloak] hide under a false appearance; "He masked his disappointment". wn
#3 mask n. activity that tries to conceal something; "no mask could conceal his ignorance"; "they moved in under a mask of friendship". wn
#4 mask v. put a mask on or cover with a mask; "Mask the children for Halloween". wn
#5 mask n. [masquerade, masquerade party, masque] a party of guests wearing costumes and masks. wn
vizzz