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.
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 The movement in the Earth's molten outer core generates electric currents. New Atlas, 10 May 2025 Designs like flow batteries that store energy by the megawatt-hour and molten salt batteries that stash power for months could outperform the reigning lithium-ion battery. Umair Irfan, Vox, 21 Apr. 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

Browse Nearby Words

Cite this Entry

“Molten.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/molten. Accessed 5 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!