Mask

Refers to coverings for all or part of the face, usually with openings for the eyes and sometimes the mouth. They are worn to hide or alter the identity of the wearer or for protection. {...} Masks are extremely varied in appearance, function, and fundamental meaning. They may be associated with ceremonies that have religious and social significance or are concerned with funerary customs, fertility rites, or curing sickness. They may be used on festive occasions or to portray characters in a dramatic performance and in re-enactments of mythological events. They may be used for warfare and as protective devices in certain sports. They are also employed as architectural ornaments.