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undercover

 - 3 dictionary results

un⋅der⋅cov⋅er

[uhn-der-kuhv-er, uhn-der-kuhv-]
–adjective
1. working or done out of public sight; secret: an undercover investigation.
2. engaged in spying or securing confidential information: an undercover agent.

Origin:
1850–55; under- + cover


1. concealed, covert, clandestine, hidden.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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un·der·cov·er   (ŭn'dər-kŭv'ər)   
adj.  
  1. Performed or occurring in secret: an undercover investigation.

  2. Engaged or employed in spying or secret investigation: undercover FBI agents.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

undercover 
1854, sheltered," from under + cover. Sense of "operating secretly" attested from 1920.
Online Etymology Dictionary, © 2001 Douglas Harper
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