1
: a sturdy vessel in which material is pounded or rubbed with a pestle
crushed the seeds in a mortar
2
[Middle French mortier]
a
: a portable muzzle-loading weapon having a tube short in relation to its caliber (see caliber sense 2b) that is used to throw bombs at high angles
mortars fired at the enemy positions
b
: any of several similar firing devices

Illustration of mortar

Illustration of mortar
  • M mortar
  • P pestle

mortar

2 of 3

noun (2)

: a plastic building material (such as a mixture of cement, lime, or gypsum plaster with sand and water) that hardens and is used in masonry or plastering
mortarless adjective

mortar

3 of 3

verb

mortared; mortaring; mortars

transitive verb

: to plaster or make fast with mortar

Examples of mortar in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
Go deeper: NoDa Company Canteen expands to a new tropical brick and mortar location in Camp North End Olde Mecklenburg Brewery The vibe: One of Charlotte's oldest breweries. Mckenzie Rankin, Axios, 10 Mar. 2025 But the deal would ultimately involve the purchase of bricks and mortar, or their construction: a simple and predictable future course of actions or change in ownership of property, protected and cosseted by lawyers and courts – by the rule of law. Nick Paton Walsh, CNN, 8 Mar. 2025
Verb
Their homes, mortared with mud and topped with straw, are vulnerable to rain. Xanthe Scharff, The Christian Science Monitor, 24 July 2023 See All Example Sentences for mortar

Word History

Etymology

Noun (1)

Middle English morter, from Old English mortere & Anglo-French mortier, from Latin mortarium

Noun (2)

Middle English morter, from Anglo-French morter, mortier, from Latin mortarium

First Known Use

Noun (1)

before the 12th century, in the meaning defined at sense 1

Noun (2)

14th century, in the meaning defined above

Verb

14th century, in the meaning defined above

Time Traveler
The first known use of mortar was before the 12th century

Browse Nearby Words

Cite this Entry

“Mortar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mortar. Accessed 25 Mar. 2025.

Kids Definition

mortar

1 of 2 noun
1
: a strong deep bowl in which substances are pounded or crushed with a pestle
2
: a short muzzle-loading cannon used to fire shells at a low speed and at high angles

mortar

2 of 2 noun
: a building material made of lime and cement mixed with sand and water that is spread between bricks or stones so as to hold them together when it hardens
mortar verb

Medical Definition

: a strong vessel in which material is pounded or rubbed with a pestle

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