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
Randall Colburn, EW.com, 1 Apr. 2025
To investigate further, the DEA had five undercover officers visit his clinic to see whether Hollington would prescribe them medications without legit medical reasons between February and July 2022, prosecutors said.
—Julia Marnin, Miami Herald, 31 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
Alan Ritchson says Reacher is the American James Bond
Reacher works with DEA agents Susan Duffy (Cassidy) and Guillermo Villanueva (Roberto Montesinos) to go undercover in the rug-importing front, which is led by businessman Zachary Beck (Hall).
—Randall Colburn, EW.com, 1 Apr. 2025
To investigate further, the DEA had five undercover officers visit his clinic to see whether Hollington would prescribe them medications without legit medical reasons between February and July 2022, prosecutors said.
—Julia Marnin, Miami Herald, 31 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 10 Apr. 2025.
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