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

Authorities are monitoring the possibility of another eruption from Anak Krakatau. I Made Sentana, WSJ, "Indonesia Tsunami Death Toll Rises to 429 as Volcano Threat Remains," 25 Dec. 2018 The activity continued early Friday with the Hawaiian Volcano Observatory confirming reports of eruptions from volcanic vents on at least two streets. Amy Lieu, Lucia I. Suarez Sang, Fox News, "Hawaii’s Kilauea volcano erupts, mandatory evacuations ordered for more than 1,000 people," 2 Oct. 2018 The Volcán de Fuego continues to cough up ash and smoke, though not with the awesome power of the June 3 eruption. New York Times, "Visiting Guatemala After a Deadly Eruption," 13 June 2018 The government in Guatemala has stopped the search for survivors of the deadly volcano eruption. Natalie Dreier, ajc, "More evacuations announced for volcano-ravaged Guatemala," 7 June 2018 Rescuers using heavy machinery and shovels found the bodies of more victims of an eruption at Guatemala's Volcano of Fire. Jane Onyanga-omara, USA TODAY, "Death toll rises in eruption of Guatemala's Volcán de Fuego," 5 June 2018 Rescuers frantically dug through ash in Guatemala on Monday in a desperate search for survivors of a volcanic eruption that killed dozens. Carolina Gamazo And Kate Linthicum,, "Rescuers frantically dig through ash after Guatemala volcano kills at least 62," 4 June 2018 Lava entered the ocean from a third flow Thursday, marking the third week of the eruption that has opened up nearly two dozen vents in rural communities., "Hawaii volcano sends another ash cloud high into the air," 25 May 2018 But as the current set of fissure eruptions got underway, not far from Pu‘u ‘Ō‘ō a full pool of lava suddenly drained out of sight. Wendell Duffield, Scientific American, "Kilauea’s Next Eruptions May Mirror a Big One in Its Past," 15 May 2018

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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Statistics for eruption

Last Updated

20 May 2019

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Time Traveler for eruption

The first known use of eruption was in 1555

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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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Comments on eruption

What made you want to look up eruption? Please tell us where you read or heard it (including the quote, if possible).


a strong desire or propensity

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