eruption
noun
erup·tion
i-ˈrəp-shən 
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
Northern and southern lights The sun is expected to churn out more eruptions in 2026 that could lead to geomagnetic storms here on Earth, giving rise to stunning aurora.
—
Marcia Dunn, Fortune, 28 Dec. 2025
Papakōlea Beach sits inside the Pu'u Mahana tuff cone, which was formed by the Mauna Loa volcano eruption around 49,000 years ago.
—Lydia Mansel, Travel + Leisure, 26 Dec. 2025
Meanwhile, a new project exploring Pompeii uncovered a stone staircase that could reconstruct what the ancient Roman city’s skyline once looked like before a volcanic eruption in AD 79 entombed it in a thick layer of ash.
—Ashley Strickland, CNN Money, 23 Dec. 2025
Several other eruptions have occurred in the past weeks, but all went unseen.
—Owen Clarke, Outside, 23 Dec. 2025
See All Example Sentences for eruption
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.
Marcia Dunn, Fortune, 28 Dec. 2025
Papakōlea Beach sits inside the Pu'u Mahana tuff cone, which was formed by the Mauna Loa volcano eruption around 49,000 years ago.
—Lydia Mansel, Travel + Leisure, 26 Dec. 2025
Meanwhile, a new project exploring Pompeii uncovered a stone staircase that could reconstruct what the ancient Roman city’s skyline once looked like before a volcanic eruption in AD 79 entombed it in a thick layer of ash.
—Ashley Strickland, CNN Money, 23 Dec. 2025
Several other eruptions have occurred in the past weeks, but all went unseen.
—Owen Clarke, Outside, 23 Dec. 2025
See All Example Sentences for eruption
Cite this Entry
“Eruption.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eruption. Accessed 31 Dec. 2025.
Copy CitationKids Definition
eruption
noun
erup·tion
i-ˈrəp-shən
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
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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share