Vulcanize \Vul"can*ize\, v. t. [imp. & p. p. {Vulcanized}; p. pr. & vb. n. {Vulcanizing}.] To change the properties of, as caoutchouc, or India rubber, by the process of vulcanization. {Vulcanized fiber}, paper, paper pulp, or other fiber, chemically treated, as with metallic chlorides, so as to form a substance resembling ebonite in texture, hardness, etc. --Knight. {Vulcanized rubber}, India rubber, vulcanized.