1
as in clandestine
undertaken or done so as to escape being observed or known by others
an undercover operation to infiltrate the terrorist organization
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
as in spy
a person who tries secretly to obtain information for one country in the territory of another usually unfriendly country
within the city was a well-organized fifth column, and these undercovers would make themselves known as soon as the invading forces breached the city limits
Synonyms & Similar Words
as in underground
Related Words
Dissimilar Words
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
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Recent Examples of undercover
Kate Linderman, Kansas City Star, 18 July 2025
Hale, 55, served in the department for 26 years working in narcotics, undercover and eventually serving as a department spokesperson and deputy chief.
—Harrison Mantas, Fort Worth Star-Telegram, 18 July 2025
Guy Lawson, Rolling Stone, 24 Mar. 2024
Back at the hospital Jack tells Brady that working undercover took a lot of courage.
—Jessica Radloff, Glamour, 8 Sep. 2023
See All Example Sentences for undercover
Noun
In 2023, an undercover agent pretending to be a 29-year-old woman with an 8-year-old daughter in West Palm Beach, Florida, came into contact with Eriksen through Kik, federal officials said.
—Kate Linderman, Kansas City Star, 18 July 2025
Hale, 55, served in the department for 26 years working in narcotics, undercover and eventually serving as a department spokesperson and deputy chief.
—Harrison Mantas, Fort Worth Star-Telegram, 18 July 2025
Adverb
Blazer had been wearing a wire, working in tandem with an FBI undercover, ensnaring more than ten coaches in an elaborate plot that revealed corruption in the basketball programs at Louisville, Arizona, LSU, USC and other schools.
—Guy Lawson, Rolling Stone, 24 Mar. 2024
Back at the hospital Jack tells Brady that working undercover took a lot of courage.
—Jessica Radloff, Glamour, 8 Sep. 2023
See All Example Sentences for undercover
Recent Examples of Synonyms for undercover
Adjective
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Speaking with Robbie Fox on the My Mom's Basement podcast, the former WWE Champion shared the story of the clandestine meeting.—
Andrew Ravens,
MSNBC Newsweek,
16 July 2025
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Even when targeting America’s enemies, not all are supportive of clandestine cyberattacks.—
Thomas Brewster,
Forbes.com,
15 July 2025
Adjective
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The bill would ban face coverings during public enforcement operations unless medically required or part of a covert investigation.—
Billal Rahman,
MSNBC Newsweek,
24 July 2025
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The human touch is also crucial for ensuring accountability with agentic AI use, particularly for security considerations like accountability and distinguishing a genuine user from a covert threat.—
Imran Aftab,
Forbes.com,
17 July 2025
Noun
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From sci-fi horror and spy thrillers to teen romances, there’s something for everyone to watch on streaming services this month.—
Monica Mercuri,
Forbes.com,
31 July 2025
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Current contenders for the coveted spy role include Aaron Taylor-Johnson, Henry Cavill, Idris Elba and Rege-Jean Page, to name a few.—
Sharareh Drury,
People.com,
31 July 2025
Adverb
-
The former Light Heavyweight Champion was one of the faces of the company back in 2005 when the company seemingly went from a sport that was considered underground into one of the most popular sports companies in the United States.—
DJ Siddiqi,
Forbes.com,
1 Aug. 2025
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The Fed staff acknowledged such structural additions underground are expensive, but said it was done to avoid adding HVAC equipment and other mechanics on the roof, which is historic.—
Christopher Rugaber,
Fortune,
24 July 2025
Adjective
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Native Americans kept secret the location of hibernacula, the underground chambers in which clusters of rattlesnakes—sometimes hundreds of them—overwinter.—
Matthew Wills,
JSTOR Daily,
3 Aug. 2025
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The founders imagined showcasing a Scotland of sea eagles soaring above secret coves and singing sands.—
Angus MacKinnon,
CNN Money,
3 Aug. 2025
Noun
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The annex said Russian intelligence operatives had reportedly hacked and gained access to the emails of numerous U.S. nonprofit organizations, including Open Society Foundations, the main grantmaking outpost of the Soros nexus, funded primarily by the billionaire financier.—
Mia Cathell,
The Washington Examiner,
2 Aug. 2025
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The city made national news in the fall of 2023 after surveillance footage emerged showing numerous political operatives allegedly stuffing ballots into four different drop boxes located throughout the city.—
Andrew Brown,
Hartford Courant,
31 July 2025
Adjective
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Spelman will be cremated in a private ceremony Thursday, his family said.—
Emiliano Tahui Gómez,
Austin American Statesman,
25 July 2025
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The works on display once formed the largest private collection in the country, but now belong to the National Gallery of Iceland.—
New York Times,
New York Times,
24 July 2025
Noun
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The agent had a pressing question: How could his coaching clients include international athletes in the evolving NIL landscape?—
Daniel Libit,
Sportico.com,
3 Aug. 2025
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Still, Parsons wanted to get his agent, David Mulugheta, involved before agreeing on any official deal.—
Nick Harris,
Fort Worth Star-Telegram,
3 Aug. 2025
Cite this Entry
“Undercover.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undercover. Accessed 6 Aug. 2025.
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