(adjective)
covered or appearing to be covered with frost, for example having a whitened or cloudy appearance;
e.g. The leaves were frosted from the previous night's snow. The glass was frosted so we couldn't see through it clearly.
(adjective)
having a pale or lightened finish or effect, describing makeup that has a pearly appearance or hair that has some parts dyed a lighter color;
e.g. She wore a frosted lipgloss in a shade of light pink.
(verb)
(American) decorated a baked product by covering it with icing or powdered sugar;
e.g. He frosted the cookies and placed them on a plate.
(verb)
covered something with small crystals of ice, became thus covered, or caused something to look as if it were thus covered;
e.g. The cold temperatures frosted the edges of the house's windows.