seˈcurity ˌclearance BrE AmE noun [uncountable and countable]
official permission for someone to see secret documents etc, or to enter a building, after a strict checking process
seˈcurity ˌclearance BrE AmE noun [uncountable and countable]
official permission for someone to see secret documents etc, or to enter a building, after a strict checking process
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012