de·ma·te·ri·al·ize (dē'mə-tîr'ē-ə-līz') tr. & intr.v.
de·ma·te·ri·al·ized, de·ma·te·ri·al·iz·ing, de·ma·te·ri·al·iz·es To deprive of or lose apparent physical substance; make or become immaterial: Mirrors have the effect of dematerializing a wall. The dry ice seemed to dematerialize as it sublimated. de'ma·te'ri·al·i·za'tion (-ə-lĭ-zā'shən) n.