vol·​ca·​nism ˈväl-kə-ˌni-zəm How to pronounce volcanism (audio)
: volcanic action or activity

Examples of volcanism in a Sentence

Recent Examples on the Web Iceland, straddling two diverging tectonic plates, hits a geological jackpot and produces about a quarter of its electricity that way; in Kenya, volcanism in the Great Rift Valley helps push that figure to more than 40 percent. Gregory Barber, WIRED, 19 July 2023 The Blundell plant relies on ancient volcanism and quirks of geology: Just below the surface are hot, naturally porous rocks that allow groundwater to percolate and heat up enough to create steam for generating electricity. Brad Plumer, New York Times, 28 Aug. 2023 Unlike the more gradual volcanism of the previous 300,000 years, the impact immediately fired all that sulfur into the atmosphere, along with tiny bits of rock and glass. WIRED, 28 Sep. 2023 This means that the overall rate of volcanism has not gone up, but rather our ability to document eruptions that are small (VEI 3 or less). Erik Klemetti, Discover Magazine, 27 Sep. 2023 Progression of ages for most recent volcanism in the Roman Magmatic Province. Erik Klemetti, Discover Magazine, 31 July 2023 There’s a very strong possibility that the whole thing comes down to volcanism, but there are other options. Jackie Appel, Popular Mechanics, 14 July 2023 Over the last 150,000 years, volcanism has been moving south. Erik Klemetti, Discover Magazine, 31 July 2023 The outburst may result from a rare case of icy volcanism on a comet—uncorked by solar heating of volatile gases trapped under cometary crusts. Daniel Vergano, Scientific American, 26 July 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'volcanism.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1830, in the meaning defined above

Time Traveler
The first known use of volcanism was in 1830

Dictionary Entries Near volcanism

Cite this Entry

“Volcanism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/volcanism. Accessed 9 Dec. 2023.

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