Meaning of cataclysm

cat•a•clysm

Pronunciation: (kat'u-kliz"um), [key]
— n.
  1. any violent upheaval, esp. one of a social or political nature.
  2. a sudden and violent physical action producing changes in the earth's surface.
  3. an extensive flood; deluge.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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