What is the meaning of refinement?

noun

• A highly developed state of perfection; having a flawless or impeccable quality."they performed with great polish"; "I admired the exquisite refinement of his prose"; "almost an inspiration which gives to all work that finish which is almost art-Joseph Conrad
  • synonyms: polish, culture, cultivation, finish
• The result of improving something.
  • usage: "he described a refinement of this technique"
  • synonyms: elaboration
• The process of removing impurities (as from oil or metals or sugar etc..
  • synonyms: refining, purification
• A subtle difference in meaning or opinion or attitude.
  • usage: "without understanding the finer nuances you can't enjoy the humor"; "don't argue about shades of meaning"
  • synonyms: nuance, nicety, shade, subtlety
• The quality of excellence in thought and manners and taste.
  • usage: "a man of intellectual refinement"; "he is remembered for his generosity and civilization"
  • synonyms: civilization, civilisation