Longman Dictionary of Contemporary English homepage

security clearance

noun
     
security clearance [uncountable and countable]
official permission for someone to see secret documents etc, or to enter a building, after a strict checking process

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary