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English definition of “wall”

wall

noun [C]  /wɔl/ us  
a vertical structure that divides or encloses something: The walls of the fortress were more than eighteen inches thick. We’d like the walls painted white. A wall of people or things is a mass of them formed in such a way that you cannot get through or past them:
(Definition of wall from the Cambridge Academic Content Dictionary © Cambridge University Press)
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