undercover

¹un·der·cov·er

adj \-ˈkə-vər\

Definition of UNDERCOVER

: acting or executed in secret; specifically : employed or engaged in spying or secret investigation <an undercover agent>

— undercover adverb

Examples of UNDERCOVER

1. <an undercover operation to infiltrate the terrorist organization>
2. <for months she's been an undercover agent pretending to be a drug dealer>

First Known Use of UNDERCOVER

1920

Related to UNDERCOVER

Synonyms: backstairs, behind-the-scenes, clandestine, covert, furtive, hole-and-corner, hugger-mugger, hush-hush, private, privy, sneak, sneaking, sneaky, stealth, stealthy, surreptitious, secret, underground, underhand, underhanded

Antonyms: open, overt, public

Related Words: back-channel, closed-door, off-the-books, off-the-record; classified, confidential, restricted, top secret, undisclosed; concealed, hidden, secreted, subterranean, unadvertised, unexposed

Near Antonyms: acknowledged, avowed; aboveboard, straightforward, unconcealed, undisguised; unclassified, unrestricted; clear, evident, manifest, obvious, patent, plain

see all synonyms and antonyms

[+]more[-]hide

Rhymes with UNDERCOVER

blow one's cover, first day cover