a. 1. Covered with hoarfrost or anything resembling hoarfrost; ornamented with frosting; also, frost-bitten; as, a frosted cake; frosted donuts. [ 1913 Webster ]
2. Provided with a surface finish which is matte or with a very fine grain, reminiscent of the surface texture of frost; as, frosted glass. Opposed to polished or burnished. [ 1913 Webster +PJC ]
Frosted work is introduced as a foil or contrast to burnished work. Knight. [ 1913 Webster ]