intransitive verb
Definition: To develop a layer of ice crystals on a surface due to cold temperatures.
Example: The grass began to frost early in the morning.
noun
Definition: A layer of ice crystals that forms on surfaces when the temperature is very low, usually below freezing.
Example: In the morning, the grass was covered in a thin layer of frost.
transitive verb
Definition: To cover something with a layer of icing or to damage it by freezing temperatures.
Example: She decided to frost the cake with chocolate icing for the party.