erup·​tion | \ i-ˈrəp-shən How to pronounce eruption (audio) \

Definition of eruption

1a : an act, process, or instance of erupting
b : the breaking out of a rash on the skin or mucous membrane
2 : a product of erupting (such as a skin rash)

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Examples of eruption in a Sentence

a great eruption of glee as it suddenly dawned on her that she had won the eruption of the volcano Krakatoa was one of the most violent in global history
Recent Examples on the Web Some QAnon followers have suggested that the pandemic was a Chinese bioweapon or that its eruption was designed in part by Democrats to derail Trump's reelection chances. Nathan Bomey, USA TODAY, "Debunked QAnon conspiracy theories are seeping into mainstream social media. Don't be fooled.," 18 Sep. 2020 Liz Cottrell, a geologist at the National Museum of Natural History, studies volcanic rocks and works with the Global Volcanism Program, which keeps track of the names, locations and eruption histories of all of the volcanoes on the planet. Anne Showalter, Smithsonian Magazine, "How the Revolutionary Thinker Alexander von Humboldt Helped to Create the Smithsonian," 17 Sep. 2020 The three-day eruption, one of the world’s largest, began June 6, 1912, and sent ash as high as 100,000 feet above the Katmai region, located about 250 miles southwest of Anchorage. Mark Thiessen, Anchorage Daily News, "Winds kick up century-old volcanic ash on Alaska Peninsula," 16 Sep. 2020 In response to the eruption of street art and racial injustice, the Urban Art Mapping Research Project created the George Floyd and Anti-Racist Street Art Database. Kennedy Rance Patrick Henry High School, Star Tribune, "Project documents street art and its role in social justice," 11 Sep. 2020 On Thursday, Duling compared himself to Harry R. Truman, the cantankerous 83-year-old who refused to leave Mount St. Helens in the days before its 1980 eruption – and died in the blast. oregonlive, "Clackamas County wildfire grows to 130,000 acres, moves within half mile of Estacada; weather improves," 11 Sep. 2020 Students will learn how to create a colorful lemon eruption and offers students a chance to gain a basic understanding of the chemical processes behind the reactions. Kristi Nix, Houston Chronicle, "Fort Bend County Library offering virtual children’s event for September," 8 Sep. 2020 Other moka pots continue to filter the coffee even after the coffee is ready, a phase unlovingly referred to as the eruption phase. Scott Simone, CNN Underscored, "Here’s why the Alessi moka pot is a must-have for coffee lovers," 31 Aug. 2020 An eruption from the fountain-type geyser can cause the surrounding area to shake from underground steam explosions just before the initial eruptions. Fox News, "Yellowstone's Giantess Geyser erupts for first time in 6 years, roars 'back to life'," 30 Aug. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'eruption.' 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 eruption

1555, in the meaning defined at sense 1a

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Time Traveler for eruption

Time Traveler

The first known use of eruption was in 1555

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Statistics for eruption

Last Updated

22 Sep 2020

Cite this Entry

“Eruption.” Dictionary, Merriam-Webster, Accessed 30 Sep. 2020.

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More Definitions for eruption


erup·​tion | \ i-ˈrəp-shən How to pronounce eruption (audio) \

Kids Definition of eruption

1 : an instance of a volcano exploding
2 : the bursting out of material from a volcano
3 : the sudden occurrence or appearance of something


erup·​tion | \ i-ˈrəp-shən How to pronounce eruption (audio) \

Medical Definition of eruption

1 : an act, process, or instance of erupting the eruption of the tooth from the gum specifically : the breaking out of an exanthem or enanthem on the skin or mucous membrane (as in measles)
2 : something produced by an act or process of erupting: as
a : the condition of the skin or mucous membrane caused by erupting
b : one of the lesions (as a pustule) constituting this condition

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