upheaval Hear it!

upheaval definition

up·heaval (up hē′vəl)

noun

  1. a heaving up, as of part of the earth's crust by an earthquake
  2. a sudden, violent change

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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