undercover

[ uhn-der-kuhv-er, uhn-der-kuhv- ]
/ ˌʌn dərˈkʌv ər, ˈʌn dərˌkʌv- /

adjective

working or done out of public sight; secret: an undercover investigation.
engaged in spying or securing confidential information: an undercover agent.

Origin of undercover

First recorded in 1850–55; under- + cover
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for undercover

British Dictionary definitions for undercover

undercover

/ (ˌʌndəˈkʌvə) /

adjective

done or acting in secretundercover operations

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012