(1):

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

(2):

(n.) 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.

(3):

(n.) Of or pertaining to a social gypsy or "Bohemian" (see Bohemian, n., 3); vagabond; unconventional; free and easy.

(4):

(n.) A native of Bohemia.

(5):

(a.) Of or pertaining to Bohemia, or to the language of its ancient inhabitants or their descendants. See Bohemian, n., 2.