molten

adjective

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

Examples of molten in a Sentence

Recent Examples on the Web
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History of rocky planets L 98-59 d is shaped by a continuous cycle between its molten interior and its atmosphere. Mrigakshi Dixit, Interesting Engineering, 16 Mar. 2026 As in other times, the molten rock was confined within Kilauea’s summit crater inside Hawaii Volcanoes National Park and hasn’t threatened homes or buildings. Jessica Mekles, FOXNews.com, 13 Mar. 2026 Like other times, the molten rock was confined within Kilauea's summit crater inside Hawaii Volcanoes National Park and hasn’t threatened homes or buildings. ABC News, 10 Mar. 2026 These molten-salt tanks act as energy buffers. David Szondy march 08, New Atlas, 8 Mar. 2026 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 23 Mar. 2026.

Kids Definition

molten

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

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