n. The art or process of variegating in color, in imitation of marble, or with veins and cloudings of any sort.n. Any marking resembling that of veined or variegated marble; hence, any mottling, veining, or clouding of a surface: as, the marbling of flesh-meat caused by alternations of fat and lean.n. The art or practice of staining paper or the cut edges of a book with variegated colors, usually in some conventional imitation of marble.