n. The doctrine that sudden catastrophes, rather than continuous change, cause the main features of the Earth's crust
the GNU version of the Collaborative International Dictionary of English
n. The doctrine that the geological changes in the earth's crust have been caused by the sudden action of violent physical causes; -- opposed to the doctrine of uniformism.
The Century Dictionary and Cyclopedia
n. The theoretical view of geological events which has as its essential basis the idea of a succession of catastrophes: the opposite of uniformitarianism. See catastrophe, 3, and cataclysm, 2.
Word Usage
"Under this topic we can also treat two terms from geology, namely catastrophism and uniformitarianism."