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top-secret

[ top-see-krit ]
/ ˈtɒpˈsi krɪt /
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adjective (of information, a document, etc.)

bearing the classification top-secret, the highest level of classified information.
limited to persons authorized to use anything so classified.Compare classification (def. 5).

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Origin of top-secret

First recorded in 1940–45; top1 + secret
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for top-secret

top-secret

adjective

containing information whose disclosure would cause exceedingly grave damage to the nation and therefore classified as needing the highest level of secrecy and security
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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