- bearing the classification top-secret, the highest level of classified information.
- limited to persons authorized to use anything so classified.Compare classification(def 5).
Origin of top-secret
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for top-secret
A fire that he insists is only picking up pace, according to top-secret intelligence briefings.ISIS Fight Has a Spy Shortage, Intel Chair Says
January 2, 2015
They described the top-secret force in detail on condition of anonymity because they were not authorized to speak publicly.Exclusive: CIA Falls Back in Afghanistan
May 5, 2014
Those looking to solve the mystery of the top-secret event stood in line beginning at 7am, but weren't let inside until 2pm.A.P.C. Releases Kanye West Collection; Max Azria Faces Insurmountable Debt
The Fashion Beast Team
July 15, 2013
About half a million other private contractors have top-secret clearance.Surveillance Program Got You Yawning? Here’s Why You Should Worry
June 11, 2013
The top-secret ‘Q Group’ has been chasing Edward Snowden since he disappeared in May.Inside the ‘Q Group,’ the Directorate Hunting Down Edward Snowden
June 10, 2013
You'd think so, with all the top-secret precautions that have been taken.
I've got some news for you concerning that top-secret gadget you told us about.Industrial Revolution
Poul William Anderson
A good thing, too, otherwise the enemy would be getting our top-secret information in print all the time.The Electronic Mind Reader
Now it was the Swifts' top-secret rocket base, tightly guarded by drone planes and radar.Tom Swift and The Visitor from Planet X
Senator Crane, a doggedly determined man, had listened to the replay of Brent Taber's top-secret conference again and again.
- containing information whose disclosure would cause exceedingly grave damage to the nation and therefore classified as needing the highest level of secrecy and security
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012