top secret

adjective
Updated on: 5 Dec 2017

Definition of top secret

1 : protected by a high degree of secrecy
  • a top secret weapon
  • a top secret meeting
2 a : containing or being information whose unauthorized disclosure could result in exceptionally grave danger to the nation
  • top secret messages
— compare confidential, secret
b : of or relating to top secret documents
  • a top secret clearance

Examples of top secret in a Sentence

  1. The mission is top secret.

Recent Examples of top secret from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'top secret.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of top secret

1944


TOP SECRET Defined for English Language Learners

top secret

adjective

Definition of top secret for English Language Learners

  • : kept completely secret by high government officials


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