vit ‧ ri ‧ fy /ˈvɪtrəfaɪ, ˈvɪtrɪfaɪ/ BrE AmE verb ( past tense and past participle vitrified , present participle vitrifying , third person singular vitrifies ) [intransitive and transitive]
technical if a substance vitrifies or is vitrified, it changes into glass
—vitrification /ˌvɪtrɪfɪˈkeɪʃ ə n/ noun [uncountable]