Mortars meaning : A mixture of lime or cement, sand and water used for bonding building blocks. A muzzle-loading, indirect fire weapon with a tube length of 10 to 20 calibers and designed to lob shells at very steep trajectories. A hollow vessel used to pound, crush, rub, grind or mix ingredients with a pestle. To use mortar or plaster to join two things together. To pound in a mortar. To fire a mortar (weapon).