• (n.) The process of removing the vitreous glaze from porcelain, leaving the dull luster of the surface of ivory porcelain.
De·pol'ish·ing (de*pŏl'ĭsh*ĭng) noun (Ceramics) The process of removing the vitreous glaze from porcelain, leaving the dull luster of the surface of ivory porcelain. Knight.