Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Performed or occurring in secret: an undercover investigation.
  • adj. Engaged or employed in spying or secret investigation: undercover FBI agents.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Performed or happening in secret.
  • adj. Employed or engaged in spying or secret investigation.
  • n. A person who works undercover.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. conducted with or marked by hidden aims or methods

Etymologies

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