as in spies
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
Relevance
Example Sentences
Recent Examples of Synonyms for undercovers
Noun
-
After all, Broidy’s private intelligence company, Circinus, hires the same kinds of former spies and commandos that Chalker’s once did.—
David D. Kirkpatrick,
New Yorker,
30 Mar. 2026 -
Shiwa Hassanpour, an activist with the human rights monitor Hengaw Organization, based in Iraq’s Kurdish region, said people have been shot for approaching the border, because Iranian forces suspect them of being spies or informants.—
ABC News,
ABC News,
30 Mar. 2026
Noun
-
In 2024 Israeli operatives infiltrated Hezbollah’s supply chain and used shell companies to sell members pagers and walkie-talkies rigged with explosives.—
Deni Ellis Béchard,
Scientific American,
26 Mar. 2026
-
Though appearing to be ordinary citizens to their friends, neighbors and even their own children, both parents are in fact elite North Korean operatives working to destabilize the South from within.—
Naman Ramachandran,
Variety,
25 Mar. 2026
Noun
-
Congress’s February efforts to resolve the shutdown were complicated by the lawless ICE campaign in Minneapolis, where federal agents killed two American citizens during a brutal crackdown on protests.—
Benjamin Wallace-Wells,
New Yorker,
29 Mar. 2026
-
The Keep Air Travel Safe Act, filed in October, extended the protection to Transportation Security Administration agents.—
ABC News,
ABC News,
28 Mar. 2026
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.
Cite this Entry
“Undercovers.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undercovers. Accessed 3 Apr. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
