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English definition of “clearance”

clearance

noun [U] (OFFICIAL PERMISSION)    /ˈklɪə.rəns/ US  /ˈklɪr.əns/
official permission for something or the state of having satisfied the official conditions of something: The plane will be taking off as soon as it gets clearance. To visit the prison , you'll need security clearance.Allowing and permitting
(Definition of clearance noun (OFFICIAL PERMISSION) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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