mol·​ten | \ ˈmōl-tᵊn How to pronounce molten (audio) \

Definition of molten

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 Below is a video of the moment, with fan music added in, and also the entire video of Hoglund discussing thorium, nuclear power and molten salt reactors. Ryan Parker, The Hollywood Reporter, 14 May 2022 Then the oxides can be turned into pure metal by adding it to a proprietary solution of molten salts heated to about 1,300 degrees Fahrenheit, and zapping the mixture with electricity, causing the pure metal to collect on an electrode. Globe Staff,, 12 May 2022 Or did even the gamely indulgent Russian, though too tactful to say so, balk at the image’s molten energy? Peter Schjeldahl, The New Yorker, 9 May 2022 During the eruption, molten material called lamproite carried debris from the Earth’s mantle, including diamonds and other gems, to the surface. Sarah Kuta, Smithsonian Magazine, 6 May 2022 The sun’s rays shining on the mirror trough system are reflected from all angles onto a linear pipe containing a fluid (sometimes molten salt or oil). Jackie Snow, WSJ, 24 Apr. 2022 The researchers still think that cryovolcanism is a good explanation since a viscous liquid or partially molten solid could spread slowly and form this sort of lumpy terrain. John Timmer, Ars Technica, 4 Apr. 2022 Arancini were piping hot, with a cheesy, creamy, molten interior. Rand Richards Cooper,, 7 Mar. 2022 Between 1970 and 1999, the flow of molten, magnetic material in Earth’s outer core changed. Jennifer Leman, Popular Mechanics, 7 Mar. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'molten.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of molten

14th century, in the meaning defined at sense 3

History and Etymology for molten

Middle English, from past participle of melten to melt

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Time Traveler for molten

Time Traveler

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

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Dictionary Entries Near molten



Molteno disease

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Last Updated

17 May 2022

Cite this Entry

“Molten.” Dictionary, Merriam-Webster, Accessed 25 May. 2022.

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More Definitions for molten


mol·​ten | \ ˈmōl-tᵊn How to pronounce molten (audio) \

Kids Definition of molten

: melted especially by very great heat molten metal

More from Merriam-Webster on molten

Thesaurus: All synonyms and antonyms for molten

Nglish: Translation of molten for Spanish Speakers


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