n. A shift or undergarment worn by women; a smock.n. A short, loose-fitting gown worn by women in the early part of the nineteenth century.n. In fortification: A wall built parallel to and outside of the main wall of a fortress, or concentric with and surrounding a tower, intended to prevent the approach of sappers to the foot of the main defense. The space between the chemise-wall and the main work which it protects, sometimes covered with a penthouse roof.n. A sleeve or an envelop of sheet-iron placed on a mandrel to receive the coils of steel ribbon used in making shot-gun barrels.n. Any covering or envelop, especially one of flexible material, as the parchment bag in which seals of wax were inclosed.n. In mech., a sheath or covering of sheet-metal; specifically, a sheet-iron cylinder placed around the tubes in a vertical boiler.