Definition of "melt"

The crust (a mere 1% of the Earth's volume) is made of lighter melt products from the mantle.

2012, Chinle Miller, In Mesozoic Lands: The Mesozoic Geology of Arches and Canyonlands National Parks, Kindle edition

I recently asked a group of people whether they had eaten tuna melts as a kid. Everyone remembered a version of this dish.

2002, Tod Dimmick, Complete idiot's guide to 20-minute meals

You are from Blackburn you fucking melt...have a bastard word with yourself.

2003 June 10, Roo, “See the Quality !!!”, in alt.sports.soccer.everton‎ (Usenet)

Kiss it ya melt!

2004 September 20, Diablos Rojos, “North South divide??”, in uk.sport.football.clubs.liverpool‎ (Usenet)

LOL! you fucking melt. Get a job.

2006 May 30, Dave G, “England vs Hungary...”, in alt.sports.soccer.everton‎ (Usenet)

Over the course of this chapter on 'Love Island Essentials' we'll be charting exactly who went with who, showing you around the villa, and equipping you with the vocabulary you'll need to avoid looking like a melt and get grafting like a true Islander.

2017, Love Island On Paper: The Official Love Island Guide to Grafting, Cracking On and Mugging Off‎, page 12

A mass of herring melts, tinged with the streams of claret, had fallen into his hair, and this, added to his temporary stupor, had led to the Doctor's mistake.

1825, Lochandhu: A Tale of the Eighteenth Century‎, page 28

I gave him a couple of Advil and, after a few minutes, urged him back onto the track. Over the next few laps his pained expression slowly melted, although he still shuffled with a slight limp.

2008 October, Davy Rothbart, “How I caught up with dad”, in Men's Health, volume 23, number 8, page 110

Thou would'st have […] melted down thy youth.

c. 1605–1608, William Shakespeare, “The Life of Tymon of Athens”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act IV, scene iii]

For pity melts the mind to love.

1687, John Dryden, A Song for Cecilia's Day

The traveller hears me now and then,⁠And sometimes harshly will he speak:⁠‘This fellow would make weakness weak,And melt the waxen hearts of men.’

1850, [Alfred, Lord Tennyson], In Memoriam, London: Edward Moxon, […], canto XXI, page 35