undercover

1 undertaken or done so as to escape being observed or known by others an undercover operation to infiltrate the terrorist organization Synonyms of undercover 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, underhandedWords Related to undercover back-channel, closed-door, off-the-books, off-the-record; classified, confidential, restricted, top secret, undisclosed; concealed, hidden, secreted, subterranean, unadvertised, unexposedNear Antonyms of undercover acknowledged, avowed; aboveboard, straightforward, unconcealed, undisguised; unclassified, unrestricted; clear, evident, manifest, obvious, patent, plainAntonyms of undercover open, overt, public

2 working on missions in which one's objectives, activities, or true identity are not publicly revealed for months she's been an undercover agent pretending to be a drug dealer Synonyms of undercover secretWords Related to undercover covert, private, secretive, subterraneanNear Antonyms of undercover overt

a person who tries secretly to obtain information for one country in the territory of another usually unfriendly country 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 Synonyms of undercover agent, asset, emissary, intelligencer, mole, operative, spook, spyWords Related to undercover courier; counterspy, double agent, sleeper; infiltrator, informer, stool pigeon; spymaster, superspy