The Collaborative International Dictionary of English v.0.48:

Virtuoso \Vir`tu*o"so\, n.; pl. Virtuosos; It. Virtuosi.
   [It. See Virtuous.]
   1. One devoted to virtu; one skilled in the fine arts, in
      antiquities, and the like; a collector or ardent admirer
      of curiosities, etc.
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            Virtuoso the Italians call a man who loves the noble
            arts, and is a critic in them.        --Dryden.
      [1913 Webster]

   2. (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.
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