[adj] used of riotously drunken merrymaking; "a night of bacchanalian revelry"; "carousing bands of drunken soldiers"; "orgiastic festivity"
\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.
\Bac`cha*na"li*an\, n. A bacchanal; a drunken reveler.