Source : Webster's Revised Unabridged Dictionary (1913)

Fashionable \Fash"ion*a*ble\, a.
   1. Conforming to the fashion or established mode; according
      with the prevailing form or style; as, a fashionable
      dress.

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

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

   4. Genteel; well-bred; as, fashionable society.

            Time is like a fashionable host That slightly shakes
            his parting guest by the hand.        --Shak.

Fashionable \Fash"ion*a*ble\, n.
   A person who conforms to the fashions; -- used chiefly in the
   plural.

Source : WordNet®

fashionable
     adj 1: being or in accordance with current fashion; "fashionable
            clothing"; "the fashionable side of town"; "a
            fashionable cafe" [syn: {stylish}] [ant: {unfashionable}]
     2: having elegance or taste or refinement in manners or dress;
        "a little less posh but every bit as stylish as Lord Peter
        Wimsey"; "the stylish resort of Gstadd" [syn: {stylish}]
        [ant: {styleless}]
     3: patronized by [syn: {popular with(p)}]