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WordReference Random House Unabridged Dictionary of American English © 2024ca•tas•tro•phism (kə tas′trə fiz′əm),USA pronunciation n. [Geol.]- Geologythe doctrine that certain vast geological changes in the earth's history were caused by catastrophes rather than gradual evolutionary processes.
- catastrophe + -ism 1865–70
Collins Concise English Dictionary © HarperCollins Publishers:: catastrophism /kəˈtæstrəˌfɪzəm/ n - an old doctrine, now discarded, that the earth was created and has subsequently been shaped by sudden divine acts which have no logical connection with each other rather than by gradual evolutionary processes
- Also called: neo-catastrophism a modern doctrine that the gradual evolutionary processes shaping the earth have been supplemented in the past by the effects of huge natural catastrophes
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