Definition of "cataclysmic" [cataclysmic]

• Of or pertaining to a cataclysm; causing great destruction or upheaval; catastrophic. (adjective)

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• "Today we seem to have trouble picturing the future, except in cataclysmic terms or as the present gone worse ( "Children of Men")."
• "Life seldom deals in cataclysmic situations – at least on the surface."
• "Never mind that the long-term cataclysmic effects of subtracting about tens of millions of young, strong people from Africa over the course of a couple of centuries is a large part of the reason why Africa now appears so distasteful to you."