The Collaborative International Dictionary of English v.0.48:

Bohemia \Bo*he"mi*a\, n.
   1. A country of central Europe.
      [1913 Webster]

   2. Fig.: The region or community of social Bohemians. See
      Bohemian, n., 3.
      [1913 Webster]

            She knew every one who was any one in the land of
            Bohemia.                              --Compton
                                                  Reade.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Bohemia
    n 1: a historical area and former kingdom in the Czech Republic
    2: a group of artists and writers with real or pretended
       artistic or intellectual aspirations and usually an
       unconventional life style