molten

adjective

mol·​ten ˈmōl-tᵊn How to pronounce molten (audio)
1
: fused or liquefied by heat : melted
molten lava
2
: having warmth or brilliance : glowing
the molten sunlight of warm skiesT. B. Costain
3
obsolete : made by melting and casting

Examples of molten in a Sentence

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.
Researchers haven’t been sure exactly what drives this rifting, but a new study in Nature Geoscience suggests it is caused by rhythmic pulses of molten rock from deep below the surface. Nora Bradford, Scientific American, 7 July 2025 That involves a narrow escape from its fiery vat of molten steel. Peter Balonon-Rosen, Vox, 4 July 2025 Instead, these changes are announced millions of years before they’re actually achieved, by the activity of molten rock in Earth’s mantle. Sam Walters, Discover Magazine, 25 June 2025 As parts of the colliding plates and seafloor are pushed into Earth’s mantle, blobs of molten rock rise upwards and come into contact with water and gases, resulting in highly-explosive mix on the surface. David Bressan, Forbes.com, 20 June 2025 See All Example Sentences for molten

Word History

Etymology

Middle English, from past participle of melten to melt

First Known Use

14th century, in the meaning defined at sense 3

Time Traveler
The first known use of molten was in the 14th century

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Cite this Entry

“Molten.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/molten. Accessed 19 Jul. 2025.

Kids Definition

molten

adjective
mol·​ten ˈmōlt-ᵊn How to pronounce molten (audio)
: melted especially by very great heat

More from Merriam-Webster on molten

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