(obsolete) A dramatic performance, formerly in vogue, in which the actors wore masks and represented mythical or allegorical characters.
(architecture) A grotesque head or face, used to adorn keystones and other prominent parts, to spout water in fountains, and the like; -- called also mascaron.
(fortification) In a permanent fortification, a redoubt which protects the caponiere.
(zoology) The lowerlip of the larva of a dragonfly, modified so as to form a prehensile organ.
(Puebloan, anthropology) A ceremonial object used in Puebloan kachina cults that resembles a Euro-American masks. (The term is objected as an appropriate translation by Puebloan peoples as it emphasizes imitation but ignores power and representational intent.)