Source : Webster's Revised Unabridged Dictionary (1913)

Bohemian \Bo*he"mi*an\, a.
   1. Of or pertaining to Bohemia, or to the language of its
      ancient inhabitants or their descendants. See {Bohemian},
      n., 2.

   2. Of or pertaining to a social gypsy or ``Bohemian'' (see
      {Bohemian}, n., 3); vagabond; unconventional; free and
      easy. [Modern]

            Hers was a pleasant Bohemian life till she was five
            and thirty.                           --Blackw. Mag.

            Artists have abandoned their Bohemian manners and
            customs nowadays.                     --W. Black.

   {Bohemian chatterer}, or {Bohemian waxwing} (Zo["o]l.), a
      small bird of Europe and America ({Ampelis garrulus}); the
      waxwing.

   {Bohemian glass}, a variety of hard glass of fine quality,
      made in Bohemia. It is of variable composition, containing
      usually silica, lime, and potash, rarely soda, but no
      lead. It is often remarkable for beauty of color.

Bohemian \Bo*he"mi*an\, n.
   1. A native of Bohemia.

   2. The language of the Czechs (the ancient inhabitants of
      Bohemia), the richest and most developed of the dialects
      of the Slavic family.

   3. A restless vagabond; -- originally, an idle stroller or
      gypsy (as in France) thought to have come from Bohemia; in
      later times often applied to an adventurer in art or
      literature, of irregular, unconventional habits,
      questionable tastes, or free morals. [Modern]

   Note: In this sense from the French boh['e]mien, a gypsy;
         also, a person of irregular habits.

               She was of a wild, roving nature, inherited from
               father and mother, who were both Bohemians by
               taste and circumstances.           --Thackeray.

Source : WordNet®

Bohemian
     adj 1: of or relating to Bohemia or its language or people
     2: unconventional in especially appearance and behavior; "a
        bohemian life style"
     n 1: a member of a nomadic people originating in northern India
          and now living on all continents [syn: {Gypsy}, {Gipsy},
           {Romany}, {Rommany}, {Roma}]
     2: a native or inhabitant of Bohemia in the Czech Republic
     3: a nonconformist writer or artist who lives an unconventional
        life