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Definition of: cataclysm
(kat′ə·kliz′əm) noun
1. An overwhelming flood.
2. Geol. Any violent and extensive subversion of the ordinary phenomena of nature on the earth's surface.
3. Any sudden overwhelming change or political or social upheaval. See synonyms under CATASTROPHE. [<Gk. kataklysmos flood <kata- down + klyzein wash]
—cat·a·clys· mal (kat′ə·kliz′məl), cat′a·clys′mic, cat′a·clys· mat′ic (-kliz·mat′ik) adjective
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