undercoveradjective [ before noun ]
uk/ˌʌn.dəˈkʌv.ər/us/ˌʌn.dɚˈkʌv.ɚ/working secretly using a false appearance in order to get information for the police or government:
an undercover police operation
an undercover detective
Thesaurus: synonyms and related words
Hiding and disguising
- be holed up idiom
- bury
- camo
- camouflage
- cloak
- conceal
- concealment
- hit the deck idiom
- hole up (somewhere)
- illusion
- incognito
- infiltration
- obscure
- sidle
- skulk
- smokescreen
- snuck
- stash
- tuck
- veil
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You can also find related words, phrases, and synonyms in the topics:
The police generally
undercover
adverb ukus
He was working undercover at the time, probably for the CIA.