Covered with frost or with something resembling it: as, frosted cake. See frosting.Having the surface roughened or unpolished; in decorated metalwork, ornamented by means of a roughened surface, whether engraved or produced by acid or by the application of a punch or die: said especially of any material which is white or nearly so when so treated: as, frosted glass, frosted silver, etc.In entomology, covered with glistening or white specks, scales, or hairs, giving an appearance like hoar frost: as, the wings of a moth frosted at the tip.In ornithology, having the plumage hoary or silvery, as if covered with frost: as, the frosted poorwill (a variety of Phalænoptilus nuttalli found in southwestern parts of the United States).