1. (

• vitrify ,

) change into glass or a glass-like substance by applying heat ;

2. (

• vitrify

) undergo vitrification; become glassy or glass-like ;

1. (

• glassy ,
• vitreous ,
• vitrified

) (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" ;