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  • Def: Cataclysm 1. any violent upheaval, esp. one of a social or political nature; 2. Physical Geography. a sudden and violent physical action producing changes in the earth's surface; 3. an extensive flood; deluge; 4. a violent upheaval that causes great destruction or brings about a fundamental change;

  • Origin: 1633, from Fr. cataclysme, from L. cataclysmos, from Gk. kataklysmos, from kata "down" + klyzein "to wash.";

  • Synonyms: calamity, cataract, catastrophe, collapse, convulsion, debacle, deluge, disaster, disturbance, flood, flooding, inundation, misadventure, overflow, torrent, tragedy, upheaval, woe.
Source: Unabridged