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upheaval

Dictionary definition · upheaval

noun

  1. a state of violent disturbance and disorder (as in politics or social conditions generally)"the industrial revolution was a period of great turbulence"
  2. a violent disturbance"the convulsions of the stock market"
  3. (geology) a rise of land to a higher elevation (as in the process of mountain building)
  4. disturbance usually in protest

Source: Open English WordNet (CC BY 4.0).