1.
Frosted glass is glass that you cannot see through clearly.
The top half of the door to his office was of ~ glass.
ADJ
2.
Frosted means covered with frost.
...the ~ trees.
ADJ
3.
Frosted means covered with something that looks like frost.
...~ blue eye shadow.
ADJ
4.
Frosted means covered with icing. (AM; in BRIT, usually use iced )
...a plate of ~ cupcakes.
ADJ