To purify; reduce to a fine, unmixed, or pure state; to free from impurities.

“to refine gold”

To become pure; to be cleared of impure matter.

To purify of coarseness, vulgarity, inelegance, etc.; to polish.

“a refined style”

The refined form of a commodity, as opposed to its raw or generic form.

“We're still purchasing copper ore, but the market for refined is weaker.”

Precise, freed from imprecision, particularly:

Cultured, freed from vulgarity, particularly:

Purified, reduced in or freed from impurities, particularly: