Example : 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.

Synonyms : cultivation, culture, finish, polish

Example : He described a refinement of this technique.

Synonyms : elaboration

Synonyms : purification, refining

Example : Without understanding the finer nuances you can't enjoy the humor.
Don't argue about shades of meaning.

Synonyms : nicety, nuance, shade, subtlety

Example : A man of intellectual refinement.
He is remembered for his generosity and civilization.

Synonyms : civilisation, civilization