un·der·cov·er
ˌən-dər-ˈkə-vər 
: acting or executed in secret
specifically
: employed or engaged in spying or secret investigation
an undercover agent
undercover
adverb
Examples of undercover in a Sentence
Adjective
an undercover operation to infiltrate the terrorist organization
for months she's been an undercover agent pretending to be a drug dealer
Noun
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
Recent Examples on the Web
Jacqueline Weiss, People.com, 8 Mar. 2025
The vast majority of undercover U.S. intelligence officers work out of embassies and consulates, posing as diplomats, and the closure of diplomatic posts would reduce the CIA's options for where to position its spies.
—arkansasonline.com, 7 Mar. 2025
Shea Simmons, People.com, 6 Feb. 2025
The Confidential Rental and Leasing Office, created under former Commissioner Ray Kelly, has an important core purpose: to give investigators, including undercovers, a way to procure and use a range of vehicles that don’t automatically give them away, which standard unmarked cop cars tend to do.
—New York Daily News Editorial Board, New York Daily News, 16 Jan. 2025
See All Example Sentences for undercover
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Adjective
Watch Captain America: Civil War on Disney+ Black Widow
After the events of Captain America: Civil War, Natasha is on the run and reunites with Yelena Belova (Florence Pugh), her undercover younger sister who also trained in the Red Room.
—Jacqueline Weiss, People.com, 8 Mar. 2025
The vast majority of undercover U.S. intelligence officers work out of embassies and consulates, posing as diplomats, and the closure of diplomatic posts would reduce the CIA's options for where to position its spies.
—arkansasonline.com, 7 Mar. 2025
Noun
Want to see what else is up for grabs during Wayfair’s undercover Kelly Clarkson Home sale?
—Shea Simmons, People.com, 6 Feb. 2025
The Confidential Rental and Leasing Office, created under former Commissioner Ray Kelly, has an important core purpose: to give investigators, including undercovers, a way to procure and use a range of vehicles that don’t automatically give them away, which standard unmarked cop cars tend to do.
—New York Daily News Editorial Board, New York Daily News, 16 Jan. 2025
See All Example Sentences for undercover
Cite this Entry
“Undercover.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undercover. Accessed 23 Mar. 2025.
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