Oxford Dictionary English topcoat noun noun BrE BrE//ˈtɒpkəʊt// ; NAmE NAmE//ˈtɑːpkoʊt// Add to my wordlistjump to other results1the last layer of paint put on a surface compare undercoat2(old-fashioned) an overcoatSee topcoat in the Oxford Advanced American DictionaryCheck pronunciation: topcoat oxfordlearnersdictionaries.com