| Undercoat 1. (n.) A coat worn under another; a light coat, as distinguished from an overcoat, or a greatcoat. 2. (n.) A growth of short hair or fur partially concealed by a longer growth; as, a dog's undercoat. Thesaurus Entries chromogen, coat, coat of paint, coating, color, color filter, color gelatin, colorant, coloring, dead-color, distemper, drier, dye, dyestuff, exterior paint, flat coat, flat wash, floor enamel, ground, interior paint, medium, opaque color, paint, pigment, prime coat, primer, priming, stain, tempera, thinner, tinction, tincture, transparent color, turpentine, turps, undercoating, vehicle, wash, wash coat | ![]() |