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.
There have been three major eruptions at Yellowstone, according to NPS. Saleen Martin, USA Today, 22 July 2025 The devastation following the volcano’s famous eruption in 79 CE is well-documented across multiple archeological sites at Pompeii, Herculaneum, and elsewhere. Andrew Paul, Popular Science, 16 July 2025 Officials said there have been a dozen volcanic eruptions on the Reykjanes Peninsula dating back to 2021. Greg Norman, FOXNews.com, 16 July 2025 The idea of Smith moving to right stemmed from his offensive eruption in the Grapefruit League. Ken Rosenthal, New York Times, 9 July 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 2 Aug. 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

Last Updated: - Updated example sentences
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