Meaning of mortar

mor•tar

1. a receptacle of hard material, having a bowl-shaped cavity in which substances are reduced to powder with a pestle.
2. any of various mechanical appliances in which substances are pounded or ground.
3. a cannon very short in proportion to its bore, for throwing shells at high angles.
4. some similar contrivance, as for throwing pyrotechnic bombs or a lifeline.

1. to attack with mortar fire or shells.

mor•tar

1. a mixture of lime or cement or a combination of both with sand and water, used as a bonding agent between bricks, stones, etc.
2. any of various materials or compounds for bonding together bricks, stones, etc.: Bitumen was used as a mortar.

1. to plaster or fix with mortar.