Word family noun cover coverage covering adjective undercover covered ≠ uncovered verb cover ≠ uncover adverb undercover
From Longman Dictionary of Contemporary Englishundercoverun‧der‧cov‧er /ˌʌndəˈkʌvə◂ $ -dərˈkʌvər◂/ adjective [only before noun] SCSECRETundercover work is done secretly by the police in order to catch criminals or find out information an undercover investigationundercover policeman/cop/agent etc undercover detectives► see thesaurus at secret —undercover adverb a cop who goes undercover to catch drug dealers He worked undercover in Germany and Northern Ireland.Examples from the Corpus
undercover• I want to apply to become an undercover agent.• How about undercover angels dressed as Batman and Robin?• People dived aside as undercover cops ambushed a planned post office raid.• However, the two men he approached to arrange the murder were undercover detectives and Taylor and his daughter were arrested.• Then I heard the slap-slap-slap of rubber-soled feet coming across the yard and did what any ice-cool undercover dude would do.• He was arrested after trying to sell guns to an undercover FBI agent.• an undercover investigation• Six members of a drug-smuggling gang were arrested after an 18-month undercover police operation.• One final question seems pertinent: What would the response have been had Mr Brettell's offence involved instead an undercover policewoman?• In a rare public statement, the tough undercover soldiers - whose motto is Who Dares Wins - have apologised.• The unit is equipped to deal with a variety of situations, including undercover surveillance.undercover investigation• The two-year undercover investigation which culminated Thursday, involved 130 searches in 36 states. 