VIT'RIFY, verb transitive [Latin vitrum, glass, and facio, to make.] To convert into glass by fusion or the action of heat; as, to vitrify sand and alkaline salts. VIT'RIFY, verb intransitive To become glass; to be converted into glass. Chimists make vessels of animal substances calcined, which will not vitrify in the fire.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI