Definition of mortar

• n. - A strong vessel, commonly in form of an inverted bell, in which substances are pounded or rubbed with a pestle.
• n. - A short piece of ordnance, used for throwing bombs, carcasses, shells, etc., at high angles of elevation, as 45¡, and even higher; -- so named from its resemblance in shape to the utensil above described.
• n. - A building material made by mixing lime, cement, or plaster of Paris, with sand, water, and sometimes other materials; -- used in masonry for joining stones, bricks, etc., also for plastering, and in other ways.
• v. t. - To plaster or make fast with mortar.
• n. - A chamber lamp or light.