Of or pertaining to a cataclysm; causing great destruction or upheaval; catastrophic.(adjective)
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Use "cataclysmic" in a sentence
"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."