Look up mortar in Wiktionary, the free dictionary.

Mortar has several meanings:

• Mortar (weapon) fires shells at a much lower velocity and higher ballistic arc than other ordnance.
• Mortar (masonry), material used in masonry to fill the gaps between blocks and bind them together.
• Mortar (firestop), hydraulic cementitious material used to firestop through-penetrations in wall and floor assemblies required to have a fire-resistance rating.
• Mortar and pestle, a vessel and implement used to crush or grind materials.
• Mortarboard, a flattened type of headwear normally worn as part of academic dress.

[ See also

• Chemical mortar battalion

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