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undermine definition

under·mine (un′dər mīn′, un′dər mīn′)

transitive verb undermined -·mined′, undermining -·min′·ing

  1. to dig beneath; excavate ground from under, so as to form a tunnel or mine
  2. to wear away and weaken the supports of erosion is undermining the wall
  3. to injure, weaken, or impair, esp. by subtle, stealthy, or insidious means

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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