Emily Dickinson Lexicon

BAC'CHA-NAL, or BAC-CHA-NA'LI-AN, n. [from Bacchus, Gr. Βακχος, the deity of wine and reveling. Qu. Ir. back, drunk; or D. bak, bowl, L. poculum; Gyp. bechari, a cup; or from raging, reveling.]

One who indulges in drunken revels; a drunkard; one who is noisy and riotous when intoxicated.