deformation

noun

de·​for·​ma·​tion ˌdē-ˌfȯr-ˈmā-shən How to pronounce deformation (audio) ˌde-fər- How to pronounce deformation (audio)
1
: alteration of form or shape
also : the product of such alteration
2
: the action of deforming : the state of being deformed
3
: change for the worse
deformational adjective

Examples of deformation in a Sentence

the catastrophic deformation of the steel girders under the enormous weight of the bridge
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.
Based on previous eruptions, changes from current activity in the earthquakes, ground deformation, summit lake conditions, and fumarolic activity would be expected if magma began to move closer to the surface. Paul Du Quenoy, MSNBC Newsweek, 27 Mar. 2025 If the volcano doesn’t erupt at all, gas emissions, earthquakes, and ground deformations would slowly decline, disappearing over a few weeks or months without ever escalating into an explosion. Sam Walters, Discover Magazine, 17 Mar. 2025 Last October, the observatory raised its alert status for Mount Spurr from green to yellow when an increase in seismic activity became pronounced and a ground deformation was spotted in satellite data. CBS News, 13 Mar. 2025 Volcanologists expect to see some warning signs that the volcano is about to erupt—more seismic activity, gas emissions, surface heating and changes to surface deformation, for example—if an eruption does occur. Sarah Kuta, Smithsonian Magazine, 14 Feb. 2025 See All Example Sentences for deformation

Word History

First Known Use

1551, in the meaning defined at sense 3

Time Traveler
The first known use of deformation was in 1551

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Cite this Entry

“Deformation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deformation. Accessed 12 Apr. 2025.

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