Definition of undercover in English:

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Pronunciation: /ˌəndərˈkəvər/


(Of a person or their activities) involved in or involving secret work within a community or organization, especially for the purposes of police investigation or espionage: an undercover police operation
More example sentences
  • In March 1999, police began an undercover surveillance operation on the prison officer.
  • Two cases emphasise the need for the use of cautions in connection with police undercover operations.
  • The charges arise out of a police undercover operation in the latter part of 1998.


As an undercover agent: a special unit of the police that operates undercover
More example sentences
  • She said two police officers went undercover for three weeks in the town at the end of July, calling themselves Matt and Anne.
  • Police went undercover at a Catholic mass to root out yobs who attacked the parish priest.
  • The claims are made by a former British soldier who worked undercover within the IRA.

Words that rhyme with undercover

cover, Glover, hardcover, lover, plover
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