A fine is a fee you pay when you break the rules, as in not turning in library materials on time, resulting in a fine. As an adjective, fine means "high quality" or "unblemished" like fine china.
If you read music, you know that fine is a spot where the music finishes. Wine, food or porcelain that is exceptionally delicious, well-made, or beautiful is called fine. Fine also means that things are okay or acceptable, like when someone asks how you are and you reply, “I'm fine.” When you are caught doing something wrong, paying a fine, money paid as a penalty, may result.