refinement

(noun) a highly developed state of perfection; having a flawless or impeccable quality. Synonyms: polish, culture, cultivation, finish. Examples: "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."

(noun) the result of improving something. Synonyms: elaboration. Example: "He described a refinement of this technique."

(noun) the process of removing impurities (as from oil or metals or sugar etc.). Synonyms: refining, purification.

(noun) a subtle difference in meaning or opinion or attitude. Synonyms: nuance, nicety, shade, subtlety. Examples: "Without understanding the finer nuances you can't enjoy the humor." "Don't argue about shades of meaning."

(noun) the quality of excellence in thought and manners and taste. Synonyms: civilization, civilisation. Examples: "A man of intellectual refinement." "He is remembered for his generosity and civilization."