Definition of undercover in English:

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undercover

Pronunciation: /ʌndəˈkʌvə/
Pronunciation: /ˈʌndəkʌvə/

adjective

Involving secret work within a community or organization, especially for the purposes of police investigation or espionage: an undercover police operation [as adverb]: he worked undercover in Northern Ireland
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.
Synonyms
hidden, concealed, masked, veiled, shrouded;
Military  black
informal hush-hush, sneaky

Words that rhyme with undercover

cover, Glover, hardcover, lover, plover

For editors and proofreaders

Line breaks: under|cover

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