frosting (Noun) — A flavoured sugar topping used to coat and decorate cakes.
frosting (Verb) — (cooking) decorate with frosting.
frosting (Verb) — Provide with a rough or speckled surface or appearance. ex. "frost the glass" ex. "she frosts her hair"
frosting (Verb) — Cover with frost. ex. "ice crystals frosted the glass"
frosting (Verb) — Damage by frost. ex. "The icy precipitation frosted the flowers and they turned brown"