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
Synonyms
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
Marta Balaga, Variety, 24 Jan. 2025
In 2023, Benjamin Coney, 30, and Emily Grace Brinley, 26, both from Conway, messaged an undercover FBI agent posing as a mom of two girls, according to a Jan. 16 news release by the U.S. Attorney’s Office for the Western District of Arkansas.
—Paloma Chavez, Kansas City Star, 21 Jan. 2025
New York Daily News Editorial Board, New York Daily News, 16 Jan. 2025
Starring Sean Penn, it was based on a book Crowe wrote after spending a year undercover as a student at Clairemont High School in San Diego.
—Justin Kroll, Deadline, 11 July 2024
See all Example Sentences for undercover 
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Adjective
One that, again, merged something familiar – an undercover cop – with something unfamiliar: the world of art fraud.
—Marta Balaga, Variety, 24 Jan. 2025
In 2023, Benjamin Coney, 30, and Emily Grace Brinley, 26, both from Conway, messaged an undercover FBI agent posing as a mom of two girls, according to a Jan. 16 news release by the U.S. Attorney’s Office for the Western District of Arkansas.
—Paloma Chavez, Kansas City Star, 21 Jan. 2025
Noun
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
Starring Sean Penn, it was based on a book Crowe wrote after spending a year undercover as a student at Clairemont High School in San Diego.
—Justin Kroll, Deadline, 11 July 2024
See all Example Sentences for undercover
Dictionary Entries Near undercover
Cite this Entry
“Undercover.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undercover. Accessed 30 Jan. 2025.
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