undercover

[uhn-der-kuhv-er, uhn-der-kuhv-]

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

Synonyms for undercover

1. concealed, covert, clandestine, hidden.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


Examples from the Web for undercover

Contemporary Examples of undercover

Historical Examples of undercover


British Dictionary definitions for undercover

undercover

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

Word Origin and History for undercover
adj.

1854, "sheltered," from under + cover (n.). Sense of "operating secretly" attested from 1920.

Online Etymology Dictionary, © 2010 Douglas Harper