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
Emiliano De Pablos, Variety, 12 Nov. 2025
Entangled is inspired by the story of real-life CIA intelligence officers Meredith and Freddie Woodruff, one of the Agency’s first undercover husband-and-wife teams, who conducted their overseas covert operations while also raising a family.
—Nellie Andreeva, Deadline, 12 Nov. 2025
Martin Suarez, Rolling Stone, 13 Sep. 2025
Season 2 of the hit Paramount+ series will continue following Martian (Michael Fassbender), a CIA agent living undercover in his own life.
—Max Goldbart, Deadline, 4 Sep. 2025
See All Example Sentences for undercover
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Adjective
Under director Carlos Therón, from a screenplay by Manuel Burque and Josep Gatell, the follow-up flips the franchise’s undercover conceit from Cádiz’s trap scene to Galicia’s summer fiesta circuit.
—Emiliano De Pablos, Variety, 12 Nov. 2025
Entangled is inspired by the story of real-life CIA intelligence officers Meredith and Freddie Woodruff, one of the Agency’s first undercover husband-and-wife teams, who conducted their overseas covert operations while also raising a family.
—Nellie Andreeva, Deadline, 12 Nov. 2025
Noun
Four other agents accompanied me, all also operating undercover.
—Martin Suarez, Rolling Stone, 13 Sep. 2025
Season 2 of the hit Paramount+ series will continue following Martian (Michael Fassbender), a CIA agent living undercover in his own life.
—Max Goldbart, Deadline, 4 Sep. 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 14 Nov. 2025.
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