Definition of "vitrify" []

• To change or make into glass or a glassy substance, especially through heat fusion. (verb-transitive)
• To become vitreous. (verb-intransitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The painting with vitreous colours on glass depends entirely on the same principles as painting in enamel, and he manner of executing it is likewise the same, except that in this the transparency of the colours being indispensably requisite no substance can be used to form them but such as vitrify perfectly, since, without such vitrification, there can be no transparency."
• "Seventhly, That all kind of vitrify'd substances, by being suddenly cool'd, become very hard and brittle."
• "As the ground underfoot and the slow-moving waters of the river begin to vitrify, so too do the flora and fauna."