molten

adjective

mol·​ten ˈmōl-tᵊn 

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

Scientists found them by dissolving away the mud and counting microscopic glass shards, remnants of the molten magma the eruption atomized into ultra-fine and rapidly cooling dust. — Jacek Krywko, ArsTechnica, 9 Aug. 2026

Located about 140 light-years away, this rocky world orbits so close to its host star that its surface is believed to be molten. — Kaif Shaikh, Interesting Engineering, 2 Aug. 2026

Johannes said, adding that the greatest difficulty in creating the bell is the risk that molten metal pressure will destroy the mold. — Philipp Jenne, Fortune, 30 July 2026

Southside Minneapolis is home to this three-napkin burger famous for its molten cheese center. — Jasmine Thompson, Midwest Living, 25 July 2026

Word History

Etymology

Middle English, from past participle of melten to melt

First Known Use

14th century, in the meaning defined at sense 3

Kids Definition

molten

adjective

mol·​ten ˈmōlt-ᵊn 

: melted especially by very great heat