I. noun
1.
a cover or partial cover for the face that has openings for the eyes and is used especially for disguise
on Halloween he wore a pirate's mask
Synonyms: domino, doughface, false face, visor, vizard
Related Word: disguise, masquerade; veil
2.
an outward appearance that seeks to obscure an underlying true character
he was able to maintain a mask of dignity and tranquillity in his time of anxiety
Synonyms: cloak, color, coloring, cover, disguise, disguisement, facade, face, false front, front, guise, masquerade, muffler, pretense, pretext, put-on, semblance, show, veil, veneer, window dressing; compare appearance 2
Related Word: affectation, air, pose, posture; fakery, sham; dissembling, dissimulation, seeming, simulation; appearance, aspect
II. verb
Synonyms: disguise , camouflage, cloak, dissemble, dissimulate, dress up
Related Word: screen, secrete, veil; blur; defend, guard, protect, safeguard, shield