undercover

adjective
UK: /ˌʌndəˈkʌvə/
US: /ˌʌndərˈkʌvər/

  1. Working secretly to get information for the police or government.

    1. The police sent an undercover officer to the school to investigate. [ ] [ ]
    2. She worked undercover for two years, infiltrating a drug smuggling ring without being caught. [ ] [ ]

Synonyms

secret clandestine covert surreptitious stealthy
undercover noun

  1. A person who is working in a secret way for the police or government in order to get information.

    1. He's an undercover. [ ] [ ]
    2. The undercovers had been watching the building for weeks before they made any arrests. [ ] [ ]
undercover verb

  1. To work secretly trying to find out information for the police or government.

    1. The police undercover in the bar. [ ] [ ]
    2. She had to undercover as a waitress to gain access to the criminal organization. [ ] [ ]
undercover adverb

  1. Acting or done in a secret way in order to catch criminals or collect information.

    1. He operated undercover. [ ] [ ]
    2. The detective worked undercover, gathering evidence to expose the corrupt officials without alarming them. [ ] [ ]

Frequently Asked Questions

The phonetic transcription of "undercover" is /ˌʌndəˈkʌvə/ in British English and /ˌʌndərˈkʌvər/ in American English. Click the 🔊 button to hear both pronunciations.

Synonyms for "undercover": secret, clandestine, covert, surreptitious, stealthy.

Example usage of "undercover": "The police sent an undercover officer to the school to investigate.". More examples on the page.