vol·​ca·​nism | \ ˈväl-kə-ˌni-zəm How to pronounce volcanism (audio) , ˈvȯl-\

Definition of volcanism

: volcanic action or activity

Examples of volcanism in a Sentence

Recent Examples on the Web Such a tear could also explain a string of curious volcanism that swoops across a broad swath of Oregon. National Geographic, "A tectonic plate is dying under Oregon. Here’s why that matters.," 29 July 2019 Thanks to its weird volcanism, Io is a world of freakish extremes. Robin George Andrews, National Geographic, "This is our best look yet at the solar system's most volcanic object," 18 July 2019 Italy’s volcanism comes from the fact that the country rests near the collision of several tectonic plates—fragments of Earth’s crust and upper mantle that are engaged in a game of geologic bumper cars. National Geographic, "Six underwater volcanoes found hiding in plain sight," 2 Aug. 2019 On the Earth’s surface, craters caused by space debris and other indications of what was going on early in our planet’s history have largely been erased by plate tectonics, volcanism, and erosion. Eva Botkin-kowacki, The Christian Science Monitor, "Apollo 11 at 50: How the moon landing changed the world," 16 July 2019 There is no Hawaiian-like island chain to speak of, and if there was a plume, there should also be volcanism at a spot far southeast of Bermuda where it is predicted to be today, and there isn’t. Robin George Andrews, National Geographic, "The volcano that built Bermuda is unlike any other on Earth," 17 May 2019 Visit a volcano museum founded by a National Geographic grantee, and see volcanism in action while exploring geysers and hot springs. National Geographic, "Iceland Middle School Expedition," 12 June 2019 The infant world would have been rent by volcanism and bombarded by other planetary crumbs, making for an environment so horrible, and so inhospitable to life, that the geologic era is named the Hadean, for the Greek underworld. Quanta Magazine, "Fossil Discoveries Challenge Ideas About Earth’s Start," 22 Jan. 2018 This process is accompanied by surface manifestations along the rift valley in the form of volcanism and seismic activity. Lucia Perez Diaz, CNN, "Big crack evidence East Africa could be splitting in two," 5 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'volcanism.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of volcanism

1830, in the meaning defined above

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Statistics for volcanism

Last Updated

11 Oct 2019

Time Traveler for volcanism

The first known use of volcanism was in 1830

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More from Merriam-Webster on volcanism

Rhyming Dictionary: Words that rhyme with volcanism

Britannica English: Translation of volcanism for Arabic Speakers

Britannica.com: Encyclopedia article about volcanism

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to engage in dissolute behavior

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