topcoat /ˈtɒpkəʊt/noun 2verb 1forms 3 noun2 •A layer of paint or varnish etc. applied after the undercoat.Fig. 7 shows the microstructures of lutetium silicate topcoat on SiC/SiC composite after various exposure tests. — 2007 •A light overcoat (outer garment).Our new acquaintance very deliberately coiled up the tube of his hookah, and produced from behind a curtain a very long befrogged topcoat with Astrakhan collar and cuffs. — 1890 verb1 •To apply a topcoat to (something). formstopcoated · topcoating · topcoats
