top secret

adjective

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

The mission is top secret.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
None of this was top secret: the M.L.B.’s website already posts the relative rate at which players connect the barrel of the bat with the ball. Louisa Thomas, New Yorker, 6 Apr. 2025 Jared Kushner’s security clearance Trump overruled intelligence officials in 2018 to grant his son-in-law, Jared Kushner, a top secret security clearance, according to the New York Times and the Washington Post. Erin Mansfield, USA Today, 29 Mar. 2025 At one point, House Intelligence ranking member Jim Himes (D-Conn.) pulled up the Office of the Director of National Intelligence’s own classification guidance, which says advance warning of an attack should be labeled as top secret. Rebecca Beitsch, The Hill, 28 Mar. 2025 Tom Krause — a technology executive who is a member of Musk's DOGE team and is working on a review of the payment system — has also been granted a top secret security clearance, according to the letter. Richard Escobedo, CBS News, 4 Feb. 2025 See All Example Sentences for top secret

Word History

First Known Use

1942, in the meaning defined at sense 1

Time Traveler
The first known use of top secret was in 1942

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Cite this Entry

“Top secret.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/top%20secret. Accessed 15 Apr. 2025.

Kids Definition

top secret

adjective
1
: protected by a high degree of secrecy
a top secret meeting
2
: containing information that is very important to the safety and defense of a nation
top secret messages

More from Merriam-Webster on top secret

Last Updated: - Updated example sentences
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