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English definition of “mortar”

mortar

noun  /ˈmɔrt·tər/ us  

mortar noun (MIXTURE)

[U] a mixture of sand, water, and cement or lime that is used to join bricks or stones to each other when building walls

mortar noun (GUN)

[C] a gun with a short, wide barrel (= part shaped like a tube) that can fire bombs high in the air
(Definition of mortar from the Cambridge Academic Content Dictionary © Cambridge University Press)
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