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
Patrick Smith, NBC News, 5 Nov. 2024
Skyler Philippi, of Columbia, Tenn., spent months in communication with undercover federal agents, planning a drone explosion that would have left thousands without power days before the general election.
—Ashleigh Fields, The Hill, 5 Nov. 2024
Justin Kroll, Deadline, 11 July 2024
Blazer had been wearing a wire, working in tandem with an FBI undercover, ensnaring more than ten coaches in an elaborate plot that revealed corruption in the basketball programs at Louisville, Arizona, LSU, USC and other schools.
—Guy Lawson, Rolling Stone, 24 Mar. 2024
See all Example Sentences for undercover 
These examples are automatically compiled from online sources to
illustrate current usage. Opinions expressed in the examples do not represent those of
Merriam-Webster or its editors.
Send us feedback
about these examples.
Adjective
Philippi was arrested on Nov. 2 by undercover agents acting as co-conspirators who had agreed to be lookouts.
—Patrick Smith, NBC News, 5 Nov. 2024
Skyler Philippi, of Columbia, Tenn., spent months in communication with undercover federal agents, planning a drone explosion that would have left thousands without power days before the general election.
—Ashleigh Fields, The Hill, 5 Nov. 2024
Noun
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
Blazer had been wearing a wire, working in tandem with an FBI undercover, ensnaring more than ten coaches in an elaborate plot that revealed corruption in the basketball programs at Louisville, Arizona, LSU, USC and other schools.
—Guy Lawson, Rolling Stone, 24 Mar. 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 15 Nov. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share