of, relating to, or resulting from a cataclysm. of the nature of, or having the effect of, a cataclysm: cataclysmic changes.
Origin of cataclysmic
Related formscat·a·clys·mi·cal·ly, adverbnon·cat·a·clys·mal, adjectivenon·cat·a·clys·mic, adjective
First recorded in 1850–55; cataclysm
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin and History for cataclysmically
1837, from cataclysm + -ic. Related: Cataclysmical (1857); cataclysmically.
Online Etymology Dictionary, © 2010 Douglas Harper