Longman Dictionary of Contemporary English
Wikipedia
A security clearance is a status granted to individuals allowing them access to classified information (state or organizational secrets) or to restricted areas, after completion of a thorough background check. The term "security clearance" is also sometimes used in private organizations that have a formal process to vet employees for access to sensitive information. A clearance by itself is normally not sufficient to gain access; the organization must also determine that the cleared individual needs to know specific information. No one is supposed to be granted automatic access to classified information solely because of rank, position, or a security clearance.
Usage examples of "security clearance".
I should get security clearance to recover planes within the hour.
Again behind closed doors, he was notified that his security clearance had been taken away, he no longer had a nuclear weapons security or surety authorization, was no longer authorized to fly as a crew member in military aircraft, and could not handle or employ any kinds of weapons, from an airborne laser all the way down to a handgun.
I had high-level security clearance, so I was of some use to her, but she had her own clearance and access to a lot of classified documents.
A classic grey man, a war veteran, a technocrat with a high security clearance and any number of high-powered connections.
Damon punched the buttons for private call, privilege of his security clearance: he wanted no crowd.
Your security clearance is not going to prepare you for what you'll learn.
If it looked to the CIC that you were getting too close to a fraulein, you got your security clearance jerkedby then his clearance was Top Secret/Crypto IV, which meant he was cleared to en- and decrypt anythingand losing that meant it would be back to some radio room.
If it looked to the CIC that you were getting too close to a fraulein, you got your security clearance jerked-by then his clearance was Top Secret/Crypto IV, which meant he was cleared to en- and decrypt anything-and losing that meant it would be back to some radio room.
Solid citizen with a good military history, and his military security clearance is top secret and still active.