top secret

top secret

Of the utmost secrecy; not to be revealed to anyone, under any circumstances. Hyphenated if used as before a noun. It should go without saying that this information is top secret—do not mention it to anyone, not even your loved ones. The top-secret memo has been at the center of an ongoing controversy within the party over the past few months.
See also: secret, top
Farlex Dictionary of Idioms.

ˌtop ˈsecret

used to describe very secret government information: These defence plans are top secret, known only to a very few people. The file was marked TOP SECRET.
See also: secret, top
Farlex Partner Idioms Dictionary
See also:
  • a round robin
  • round robin
  • eleventh hour
  • heads I win, tails you lose
  • black market
  • good for nothing
  • good-for-nothing
  • a light touch
  • wiggy
  • first hand
References in periodicals archive
Another theme of Top Secret America is that policymakers are flooded with marginally informative and redundant conclusions, and major challenges exist in processing the enormous volume of intelligence gathered.
- Top Secret Theatre Tickets: lastminite.com can secure discounted tickets in the top three seating bands for both musicals and West End plays.
Prime Minister Gordon Brown has presented Margaret with a rare and special personal honour of recognition for her top secret war work.
Top secret COMSEC accounts will require four Soldiers with a top secret clearance; one to be the primary COMSEC custodian and the other to be the assistant COMSEC custodian.
Philip Lacey, sales director at David Wilson, said: "Our new 'Top Secret' deal is arguably one of the best we've ever offered, so we're keeping it under wraps just to add an element of suspense and to keep our competitors guessing.
Top Secret: The Truth Behind Today's Pop Mysticisms
Apparently this was a 'top secret' mission, although the news got out pretty sharpish.
John Locker with the 8ins optical telescope he used to identify the top secret US spy satellite
More than one-fourth of applications for security clearances ask for "Top Secret," up from just about one out of six in 1995, according to the Government Accountability Office.
This military building is also the target of some internationally-funded saboteurs and Foyle enters the top secret arena of weapons research in his pursuit of the truth.
Now the government is arguing that by subjecting detainees to such treatment, the CIA gives them ''top secret'' classified information -- and the government can then take extraordinary measures to keep them quiet about it.
He starred as suave secret agent Peter Dallas in Sixties TV drama Top Secret and appeared in the likes of The Avengers and The Scarlet Pimpernel.
I don't know much about his work there because it is top secret. One computer system he uses is so confidential that the password changes several times an hour.
All Steganos products use an encryption algorithm that is considered good enough by the US government to protect Top Secret data.
Insiders fear top secret details on terror suspects plotting attacks might be on the computers.