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
The lake formed 7,700 years ago, when a violent eruption triggered the collapse of a tall peak.
—
Lauren Schuster, Kansas City Star, 23 Apr. 2026
The thousands of tremors suggested that either an eruption or a major earthquake was imminent, and a precautionary evacuation plan was activated.
—Robin George Andrews, Scientific American, 23 Apr. 2026
Due to the eruption, the upper 1,300 feet of the summit was removed by a huge debris avalanche.
—Lauren Schuster, Sacbee.com, 22 Apr. 2026
That person belongs to a different time, to a different town and to people who cannot be expected to remain the same, any more than the slopes of a volcano can be expected to still be molten rock an eon after the last eruption.
—Jessica Kiang, Variety, 17 Apr. 2026
See All Example Sentences for eruption
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Lauren Schuster, Kansas City Star, 23 Apr. 2026
The thousands of tremors suggested that either an eruption or a major earthquake was imminent, and a precautionary evacuation plan was activated.
—Robin George Andrews, Scientific American, 23 Apr. 2026
Due to the eruption, the upper 1,300 feet of the summit was removed by a huge debris avalanche.
—Lauren Schuster, Sacbee.com, 22 Apr. 2026
That person belongs to a different time, to a different town and to people who cannot be expected to remain the same, any more than the slopes of a volcano can be expected to still be molten rock an eon after the last eruption.
—Jessica Kiang, Variety, 17 Apr. 2026
See All Example Sentences for eruption
Cite this Entry
“Eruption.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eruption. Accessed 28 Apr. 2026.
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
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