Definition of mortar noun from the Oxford Advanced American Dictionary

     

    mortar

     noun
    noun
    NAmE//ˈmɔrt̮ər//
     
     
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  1. 1[uncountable] a mixture of sand, water, lime, and cement used in building for holding bricks and stones together
  2. 2[countable] a heavy gun that fires bombs and shells high into the air; the bombs that are fired by this gun to come under mortar fire/attack
  3. 3[countable] a small hard bowl in which you can crush substances such as seeds and grains into powder with a special object (called apestle)
  4. Idioms
    bricks and mortar
     
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    buildings, when you are thinking of them in connection with how much they cost to build or how much they are worth They put their money into bricks and mortar. (business) a new Internet company without a lot of bricks-and-mortar businesses (= businesses with buildings that customers go to) brick-and-mortar businesses
See the Oxford Advanced Learner's Dictionary entry: mortar

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