As a verb:
* Meaning: To make something pure or free from impurities.
* Example: "The goldsmith fined the silver."
As a noun:
* Meaning: A sum of money paid as a penalty.
* Example: "He had to pay a fine for speeding."
Other meanings:
* "Fine" can also be used as an adjective, meaning very small or thin, or excellent in quality.
Example:
* "The artist used fine brushstrokes."
* "That was a fine meal!"
To understand the correct part of speech, you need to look at its context in the sentence.