1 [usually before noun]TI
a substance that is refined has been made pure by an industrial process [↪ raw, crude; ≠ unrefined]
someone who is refined is polite and seems to be well-educated or to belong to a high social class - sometimes used humorously:
a refined way of speaking
a method or process that is refined has been improved to make it more effective [↪ sophisticated]:
Laser surgery has become much more refined over the last decade.