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Showing results for undercover.
Definitions

undercover

[uhn-der-kuhv-er, uhn-der-kuhv-] / ˌʌn dərˈkʌv ər, ˈʌn dərˌkʌv- /
ADJECTIVE
secret, spy
Synonyms
STRONGEST
covert
WEAK
clandestine concealed confidential creep furtive hidden hole-and-corner hush-hush incognito intelligence on the Q.T. private stealth stealthy sub-rosa surreptitious under wraps underground underhand underneath
Antonyms
WEAK
known open public

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

PC Charlie Cano is the 10th serving or former officer to be found guilty of gross misconduct on the back of Panorama's undercover investigation at station.

From BBC • Apr. 10, 2026

Cdr Simon Messinger said Cano's behaviour recorded by an undercover journalist working covertly in the custody suite was "appalling".

From BBC • Apr. 10, 2026

Meanwhile, Halliday plays Daisy, a recent arrival to the Pearl Girl squad who is really there as an undercover spy for the Gilead’s resistance group, Mayday, under the guidance of June.

From Los Angeles Times • Apr. 8, 2026

Her plot-rich story includes art terrorists, undercover agents, snooty Parisians, sneaky New Yorkers and a one-armed billionaire.

From The Wall Street Journal • Mar. 30, 2026

Maybe she’s an undercover spy who taps a Morse code message to the superhero Isaiah Dunn.

From "Isaiah Dunn Is My Hero" by Kelly J. Baptist

Vocabulary lists containing undercover

Secret

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