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volcanism

American  
[vol-kuh-niz-uhm] / ˈvɒl kəˌnɪz əm /

noun

Geology.
  1. the phenomena connected with volcanoes and volcanic activity.


volcanism British  
/ ˈvɒlkəˌnɪzəm /

noun

  1. 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

Etymology

Origin of volcanism

First recorded in 1865–70; volcan(o) + -ism

Vocabulary lists containing volcanism

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The good news, at least for our species, is that this unstoppable power of volcanism changed the planet, but did not end humanity – or come close to doing so.

From Science Daily Sep. 22, 2026

Their findings indicate that volcanism can temporarily weaken the climate link between the Indian and Pacific oceans.

From Science Daily Sep. 13, 2026

“The intriguing feature could improve our understanding of volcanism not only on Io but on other worlds as well.”

From Salon Feb. 3, 2025

“Erebus helps us understand what other volcanism in the region could look like.”

From Science Magazine Dec. 2, 2024

Because it seemed desirable to conserve the best two of these examples of recent volcanism, President Taft in 1906 created the Lassen Peak and the Cinder Cone National Monuments.

From The Book of the National Parks by Robert Sterling Yard

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