virtuoso

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A musician with masterly ability, technique, or personal style.
• noun A person with masterly skill or technique in the arts.
• noun Archaic A person with a strong interest in the fine arts, especially in antiquities.
• noun Obsolete A very learned person.
• adjective Exhibiting the ability, technique, or personal style of a virtuoso.

from The Century Dictionary.

• noun An experimental philosopher; a student of things by direct observation.
• noun One who has an instructed appreciation of artistic excellence; a person skilled in or having a critical taste for any of the elegant arts, as painting, sculpture, etc.; one having special knowledge or skill in antiquities, curiosities, and the like.
• noun One who is a master of the mechanical part of a fine art, especially music, and who makes display of his dexterity. See virtuosity, 2.

from the GNU version of the Collaborative International Dictionary of English.

• noun One devoted to virtu; one skilled in the fine arts, in antiquities, and the like; a collector or ardent admirer of curiosities, etc.
• noun (Mus.) A performer on some instrument, as the violin or the piano, who excels in the technical part of his art; a brilliant concert player.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A person (especially a musician) with masterly ability, technique, or personal style
• adjective Exhibiting the ability of a virtuoso

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective having or revealing supreme mastery or skill
• noun a musician who is a consummate master of technique and artistry
• noun someone who is dazzlingly skilled in any field