noun.
A person with expert knowledge or training, especially in the fine arts.
noun.
A person of informed and discriminating taste.
The Century Dictionary and Cyclopedia
noun.
A critical judge of any art, particularly of painting, sculpture, or music; one competent to pass a critical judgment: as, a connoisseur of carvings; a connoisseur of lace.
the GNU version of the Collaborative International Dictionary of English
noun.
One well versed in any subject; a skillful or knowing person; a critical judge of any art, particulary of one of the fine arts.