Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

top secret

adjective

Simple Definition of top secret

  • : kept completely secret by high government officials

Source: Merriam-Webster's Learner's Dictionary

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 in a sentence

  1. The mission is top secret.



1944

First Known Use of top secret

1944


Seen and Heard

What made you want to look up top secret? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

at a gallop

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alphabet-pasta-spelling-help

Which is the correct spelling?

acommodate acommadate accommodate accomodate
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ