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.
This cake is best slightly underbaked so the center is molten like a lava cake. The New York Times News Service Syndicate, San Diego Union-Tribune, 10 Sep. 2025 To bring sand to its molten state, the furnace must be heated to over 2,700 degrees Fahrenheit (1,500 degrees Celisus) for as long as 50 hours, which requires burning fossil fuels such as natural gas, releasing greenhouse gases. Aki Ishida, The Conversation, 10 Sep. 2025 This represents a next-gen nuclear tech in which the fuel is mixed with the molten salt, unlike traditional reactors that rely on solid fuels. Georgina Jedikovska, Interesting Engineering, 9 Sep. 2025 These processes created microscopic craters and splashes of molten rock on the asteroid's surface, according to the paper. Sharmila Kuthunur, Space.com, 2 Sep. 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 16 Sep. 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
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