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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Scientists also suspect that lava tubes, a subsurface conduit for molten lava, are present on the moon and Mars. Eric Lagatta, USA Today, 11 Feb. 2026 Scientists have long wondered how much hydrogen might be buried in Earth’s molten metal engine, and have analyzed chemical interactions in iron to try to estimate the metallic core’s hydrogen reservoir. Mindy Weisberger, CNN Money, 10 Feb. 2026 This supersized ooey, gooey raspberry molten chocolate cake is rich and chocolatey. Nellah Bailey McGough, Southern Living, 10 Feb. 2026 Ironically, the same molten lava that once devastated the island has both built it back up and kept these dwellings cool. Abby Montanez, Robb Report, 8 Feb. 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 18 Feb. 2026.

Kids Definition

molten

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

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