top secret

See also: top-secret

English

Adjective

top secret (not comparable)

  1. (military, government) Information classified at one of the highest levels of sensitivity by a government, based on an assessment that it would cause exceptionally grave damage to national security if disclosed.
    NSA's report on the Liberty incident was originally classified top secret.
  2. A level of security clearance needed to access such information.
  3. (figuratively) Pertaining to any especially sensitive closed-room activities.
    Steve Jobs set up a top secret team to design the Macintosh.

Alternative forms

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Translations

Noun

top secret (plural top secrets)

  1. A secret that is classed as "top secret"; top-secret information.
  2. Used other than figuratively or idiomatically: see top,‎ secret.

Further reading
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