adjective. (of ceramics) having the surface made shiny and nonporous by fusing a vitreous solution to it.
Example sentences of the word vitrified
1. Verb, past participle
The clay is of lower quality than other types of chinaware and it does not become hard and glassy (vitrified) after it is fired.
In the case of vitrified castles, it is the sand used between the building stones that has become vitrified, turning it into a form of crude glass with a blackish or dark gray color.
3. Verb, past tense
Use vitrified tiles, which are made of compressed clay dust, if you wish to install tiles without grout.