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 At the foundry in Greenpoint, the cast will be pressed into sand, creating a negative impression that will receive the molten bronze. New York Times, "In the Bronx, a Face Lost in Time," 22 Jan. 2021 What has distinguished the past year is the molten mix of a pandemic, racial justice protests, and political unrest. Paul Schwartzman, Washington Post, "A city under siege," 15 Jan. 2021 Volcanic cathedrals of flame unleashed armies of molten rock that obliterated the surface of the planet. Quanta Magazine, "Rumbles on Mars Raise Hopes of Underground Magma Flows," 1 Feb. 2021 The researchers say these grains make magma more viscous, preventing volcanic gases from escaping the molten rock. Harini Barath, Scientific American, "‘Nanolites’ Can Trigger Dangerous Volcanic Explosions," 4 Jan. 2021 Other storage options include heating volcanic rock or molten salt, pressurizing air in containers, storing energy in flywheels and moving weights up into the air or down old mine shafts. Rochelle Toplensky, WSJ, "Green Energy Will Need More Storage Space," 29 Dec. 2020 Further down the road, NASA’s interests include experimental nuclear reactors that are popular for Earth research, too, like fusion or molten salt. Caroline Delbert, Popular Mechanics, "The Nuclear Energy That Will Send Us to the Moon and Mars," 21 Dec. 2020 Eleven days after setting out, the men caught their last glimpse of our planet’s star as its final molten flicker melted into the horizon. Adventure, "The untold story of the boldest polar expedition of modern times," 23 Dec. 2020 At his local forge, Vaughn made impressions of the original hands in casting sand and poured molten pewter into molds. Jesse Leavenworth,, "Plymouth man’s handmade Christmas ornaments celebrate Connecticut’s clockmaking past," 19 Dec. 2020

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.

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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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Statistics for molten

Last Updated

22 Feb 2021

Cite this Entry

“Molten.” Dictionary, Merriam-Webster, Accessed 27 Feb. 2021.

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More Definitions for molten



English Language Learners Definition of molten

: melted by heat


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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