Entry 2 senses Webster, 1913 Bacchanalia /(băk`kȧ*nā"lĭ*ȧ)/ · Bac·cha·na·li·a · IPA /ˌbækəˈneɪli.ə/ 01 n. pl. A feast or an orgy in honor of Bacchus. 1. A feast or an orgy in honor of Bacchus.(Myth.) 2. Hence: A drunken feast; drunken revels; an orgy.