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

Each cycle offered roughly 20 minutes before the molten steel cooled enough to develop a solid crust. — Aamir Khollam, Interesting Engineering, 30 Sep. 2026

Since the gas will also escape from molten rock, this provides a measure of when the rock solidified. — Elizabeth Rayne, ArsTechnica, 30 Sep. 2026

The pipe installation was done before modern welding standards and the molten metal didn’t make its way into the space between the two pipes, eventually leading to the failure. — Aaron Cooper, CNN Money, 29 Sep. 2026

Striking a pose with her hands on her hips, the White Lotus actress—who last attended the VMAs in 2024 in an optical illusion hooded corset gown—showed off two-inch-long curved nude nails and encased each finger in molten silver half-moon rings. — Lara Walsh, InStyle, 27 Sep. 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