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top secret

adjective

Simple Definition of top secret

  • : kept completely secret by high government officials

Full Definition of top secret

  1. 1 :  protected by a high degree of secrecy <a top secret weapon> <a top secret meeting>

  2. 2a :  containing or being information whose unauthorized disclosure could result in exceptionally grave danger to the nation <top secret messages> — compare confidential, secretb :  of or relating to top secret documents <a top secret clearance>

Examples of top secret

  1. The mission is top secret.



1944

First Known Use of top secret

1944


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