eruption

noun

erup·​tion i-ˈrəp-shən How to pronounce eruption (audio)
1
a
: 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)

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Geologists believe that the primary trigger was climatic and ocean changes related to large-scale volcanic eruptions in what is today Siberia, Russia. Rachael O'Connor, MSNBC Newsweek, 17 Oct. 2025 Dozens of people living in villages nearest to the volcano were evacuated after the eruptions, according to Avelina Manggota Hallan, an official at the local disaster mitigation agency. Reuters, NBC news, 15 Oct. 2025 Miners argue increased subjection to the dust has led to an eruption of black lung, an incurable disease associated with inhaling the particles. Sasha Rogelberg, Fortune, 14 Oct. 2025 The result is a torus of gas, dust and other debris stretching around Jupiter, constantly replenished by Io’s incessant eruptions. Nola Taylor Tillman, Scientific American, 13 Oct. 2025 See All Example Sentences for eruption

Word History

First Known Use

1555, in the meaning defined at sense 1a

Time Traveler
The first known use of eruption was in 1555

Cite this Entry

“Eruption.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eruption. Accessed 22 Oct. 2025.

Kids Definition

eruption

noun
erup·​tion i-ˈrəp-shən How to pronounce eruption (audio)
1
: an act, process, or instance of erupting
2
: a product (as a skin rash) of erupting

Medical Definition

eruption

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

More from Merriam-Webster on eruption

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