[vol-kuh-niz-uh m]

noun Geology.

the phenomena connected with volcanoes and volcanic activity.

Also vulcanism.

Origin of volcanism

First recorded in 1865–70; volcan(o) + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for volcanism

Historical Examples of volcanism

  • Volcanoes and volcanism are not restricted to the planet Earth.


    Robert I. Tilling

British Dictionary definitions for volcanism




those processes collectively that result in the formation of volcanoes and their products
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for volcanism

1869, from French volcanisme; see volcano + -ism.

Online Etymology Dictionary, © 2010 Douglas Harper