noun
Definition: A substance used in construction to bind bricks or stones together, often made from a mixture of cement, sand, and water. It can also refer to a bowl used with a pestle to grind substances.
Example: The builder mixed the mortar to ensure the bricks would hold together firmly.
transitive verb
Definition: To use a type of explosive weapon that fires shells, or to apply a mixture used in construction to bind materials together.
Example: The army decided to mortar the enemy's position to weaken their defenses.