To purify; reduce to a fine, unmixed, or pure state; to free from impurities.
Example: "To refine gold"
To become pure; to be cleared of impure matter.
To purify of coarseness, vulgarity, inelegance, etc.; to polish.
Example: "A refined style"
To improve in accuracy, delicacy, or excellence.
To make nice or subtle.
Example: "To refine someone's language"