Source : Webster's Revised Unabridged Dictionary (1913)

Vitrified \Vit"ri*fied\, a.
   Converted into glass.

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.

Source : WordNet®

vitrified
     adj : (of ceramics) having the surface made shiny and nonporous by
           fusing a vitreous solution to it; "glazed pottery";
           "glassy porcelain"; "hard vitreous china used for
           plumbing fixtures" [syn: {glassy}, {vitreous}]

vitrify
     v 1: change into glass or a glass-like substance by applying heat
     2: undergo vitrification; become glassy or glass-like
     [also: {vitrified}]

vitrified
     See {vitrify}