clandestine
Americanadjective
adjective
Other Word Forms
Etymology
Origin of clandestine
First recorded in 1560–70; from Latin clandestīnus, from clamde, clande (unrecorded) (variant of clam “secretly” + -de, adverb particle) + -stīnus (probably after intestīnus “internal”; see intestine)
Explanation
Use the adjective clandestine to describe something that is done in secret, like your clandestine attempts to steal your brother's Halloween candy. Clandestine, an adjective imported from Latin, describes a secret, usually illegal activity. Often these things have to do with political and spy organizations. The CIA might run a clandestine operation to infiltrate terrorist organizations. Words with similar meanings include secret; covert, used especially for military matters; undercover, common in espionage; and surreptitious which emphasizes a person's efforts to keep something secret.
Vocabulary lists containing clandestine
The Vocabulary.com Top 1000
Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!
"Black Panther" Lingo
Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!
Words for the High School Graduate
Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
McDonald's assessment was echoed by Marc Polymeropoulos, a 26-year veteran of the CIA who served in both Iraq and Afghanistan and oversaw clandestine missions around the world.
From BBC ● Aug. 11, 2026
Joe Biden’s clandestine 2023 train trip to Ukraine involved a false public schedule, but it also included two journalists—and everyone else found out about it as soon as Biden arrived.
From Slate ● Aug. 11, 2026
He counsels them not to be afraid, even after early clandestine operations injure first the narrator, then Gavriel.
From The Wall Street Journal ● Jul. 24, 2026
Most vessels are now using channels approved by Iran “or other clandestine routes, while traffic through the Omani waters has effectively dried up,” they wrote.
From MarketWatch ● Jul. 21, 2026
I tried to imply clandestine dealings with a high occupation official.
From "The Hiding Place" by Corrie ten Boom
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
