mortars

/M AO1 R T ER0 Z/
noun
  1. 1

    A mixture of lime or cement, sand and water used for bonding building blocks.

  2. 2

    A muzzle-loading, indirect fire weapon with a tube length of 10 to 20 calibers and designed to lob shells at very steep trajectories.

  3. 3

    A hollow vessel used to pound, crush, rub, grind or mix ingredients with a pestle.

verb
  1. 1

    To use mortar or plaster to join two things together.

  2. 2

    To pound in a mortar.

  3. 3

    To fire a mortar (weapon).

Source: https://en.wiktionary.org/wiki/mortar, https://en.wiktionary.org/wiki/mortars