(1):

(n.) A person who conforms to the fashions; - used chiefly in the plural.

(2):

(a.) Genteel; well-bred; as, fashionable society.

(3):

(a.) Observant of the fashion or customary mode; dressing or behaving according to the prevailing fashion; as, a fashionable man.

(4):

(a.) Conforming to the fashion or established mode; according with the prevailing form or style; as, a fashionable dress.

(5):

(a.) Established or favored by custom or use; current; prevailing at a particular time; as, the fashionable philosophy; fashionable opinions.