Vitrify \Vit"ri*fy\, v. t. [imp. & p. p. {Vitrified}; p. pr. &
vb. n. {Vitrifying}.] [F. vitrifier; L. vitrum glass +
-ficare to make. See {Vitreous}, {-fy}.]
To convert into, or cause to resemble, glass or a glassy
substance, by heat and fusion.
[1913 Webster]