Source : Webster's Revised Unabridged Dictionary (1913)

Bacchanalian \Bac`cha*na"li*an\, a.
   Of or pertaining to the festival of Bacchus; relating to or
   given to reveling and drunkenness.

         Even bacchanalian madness has its charms. --Cowper.

Bacchanalian \Bac`cha*na"li*an\, n.
   A bacchanal; a drunken reveler.

Source : WordNet®

bacchanalian
     adj : used of riotously drunken merrymaking; "a night of
           bacchanalian revelry"; "carousing bands of drunken
           soldiers"; "orgiastic festivity" [syn: {bacchanal}, {bacchic},
            {carousing}, {orgiastic}]