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

  • n. The process of being heaved upward.
  • n. An instance of being so heaved.
  • n. A sudden, violent disruption or upset: "the psychic upheaval caused by war” ( Wallace Fowlie).
  • n. Geology A raising of a part of the earth's crust.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the process of being heaved upward, especially the raising of part of the earth's crust
  • n. a sudden violent upset, disruption or convulsion

from the GNU version of the Collaborative International Dictionary of English

  • n. The act of upheaving, or the state of being upheaved; esp., an elevation of a portion of the earth's crust.

from The Century Dictionary and Cyclopedia

  • n. The act of upheaving, or the state of being upheaved; a heaving or lifting up; specifically, in geology, a disturbance of a part of the earth's crust, having as one of its results that certain areas occupy a higher position with reference to adjacent areas than they did before the disturbance took place.

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

  • n. a violent disturbance
  • n. disturbance usually in protest
  • n. a state of violent disturbance and disorder (as in politics or social conditions generally)
  • n. (geology) a rise of land to a higher elevation (as in the process of mountain building)


From upheave +‎ -al. (Wiktionary)



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