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
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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.
Recent Examples of undercover
Paul Tassi, Forbes.com, 12 May 2025
Additional surveillance cameras were added and undercover patrols have been implemented in the affected areas, Abbott said.
—Shambhavi Rimal, Fort Worth Star-Telegram, 10 May 2025
Jessica Radloff, Glamour, 8 Sep. 2023
The documentary is a first time collaboration between ABC News Studios and the Associated Press following a former Army sniper undercover inside the KKK.
—ABC News, 30 Apr. 2023
See All Example Sentences for undercover
Adjective
This is how these games work, and the entire concept wouldn’t work if Jason is supposed to be an active undercover cop working toward some big reveal at the end.
—Paul Tassi, Forbes.com, 12 May 2025
Additional surveillance cameras were added and undercover patrols have been implemented in the affected areas, Abbott said.
—Shambhavi Rimal, Fort Worth Star-Telegram, 10 May 2025
Noun
Back at the hospital Jack tells Brady that working undercover took a lot of courage.
—Jessica Radloff, Glamour, 8 Sep. 2023
The documentary is a first time collaboration between ABC News Studios and the Associated Press following a former Army sniper undercover inside the KKK.
—ABC News, 30 Apr. 2023
See All Example Sentences for undercover
Recent Examples of Synonyms for undercover
Adjective
-
Tired of using bulky night vision goggles for your clandestine nocturnal activities?—
Jennifer Ouellette,
ArsTechnica,
22 May 2025
-
The fiery combination of Mars trine Venus sparks things up in your clandestine 12th house of secrets and eighth house of intimate affairs.—
Valerie Mesa,
People.com,
22 May 2025
Adjective
-
Striking Iran’s nuclear program would likely set off a much larger conflict in which Israel and the United States hunt for covert Iranian nuclear sites and Tehran retaliates in the Middle East and beyond.—
Richard Nephew,
Foreign Affairs,
26 May 2025
-
Mon Mothma's speech Mon Mothma's covert support of the Rebels becomes public following the devastating events of the Ghorman Massacre.—
Nick Romano,
EW.com,
25 May 2025
Noun
-
North Korea has repeatedly failed to launch military spy satellites.—
Choe Sang-Hun,
New York Times,
31 May 2025
-
The battle shifts to European cities as the series transitions from SEAL operations to international spy espionage, featuring a team that includes Mossad agent Eliza Perash (Rona-Lee Shimon).—
Bryan Alexander,
USA Today,
29 May 2025
Adverb
-
The French then moved their bomb tests underground to In Ekker, further east in Algeria.—
Matthew Wills,
JSTOR Daily,
2 June 2025
-
The carbon can then be reused or injected deep underground where it will be naturally transformed into stone, locking it up permanently.—
Laura Paddison,
CNN Money,
30 May 2025
Adjective
-
Nor is there a secret shortcut that nobody told you about.—
Eliza Brooke,
Vox,
23 May 2025
-
Who wouldn’t buy anything O’Connor, with his darling secret smile, tells them?—
Stephanie Zacharek,
Time,
23 May 2025
Noun
-
Mission now accomplished, Kittridge and U.S. Intelligence operative Jasper Briggs (Shea Whigham) — revealed to be the son of Jim Phelps (Jon Voight) from the first Mission — show up with a peace offering for Ethan.—
EW.com,
EW.com,
23 May 2025
-
Prior to joining the Hunger Games franchise, he was best known for his portrayal of CIA operative Felix Leiter in the James Bond films.—
Emily Blackwood,
People.com,
22 May 2025
Adjective
-
The museums are typically built in the presidents’ home states with private donations and endowments.—
Swapna Venugopal Ramaswamy,
USA Today,
26 May 2025
-
The center, which does not receive government funding, relies solely on private donations to keep their programs and facility up and running.—
Toria Sheffield,
People.com,
26 May 2025
Noun
-
My dad was a crime scene detective, my mom was an undercover narcotics agent, and my stepfather was an FBI agent.—
Scott Roxborough,
HollywoodReporter,
23 May 2025
-
The agents, most of which are set to be available by the end of 2025, can perform a variety of tasks; one handles sourcing and procurement, while another creates and manages quotes and still another orchestrates stock and handles in-store inventory details.—
Meghan Hall,
Sourcing Journal,
23 May 2025
Cite this Entry
“Undercover.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undercover. Accessed 6 Jun. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share