underpinning Hear it!

underpinning definition

under·pin·ning (un′dər pin′iŋ)

noun

  1. a supporting structure or foundation, esp. one placed beneath a wall
  2. a support or prop
  3. ☆ Informal the legs

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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