A creative artist, especially a film director, seen as having a specific, recognisable artistic vision, and who is seen as the single or preeminent ‘author’ of his works.
Specifically, a musician (or other performer) with masterly ability, technique, or personal style.
An expert in virtù or art objects and antiquities; a connoisseur.
Someone with special skill or knowledge; an expert.
Exhibiting the ability of a virtuoso.