long-coat noun3 •A long overcoat.Male religious specialists also wear a somewhat larger long-coat when performing religious ceremonies. This long-coat is dark blue or black and relatively plain. — 2002 •A long-haired variety of a breed.It is expected that half of such females will contain recessive the character long-coat, and that half will be free from it, i. e., will produce only short-haired young. — 1894 •Alternative form of longcoat. formslong-coats