[sat.ur.na.lia] n pl but sing or pl in constr [L, fr. neut. pl. of saturnalis of Saturn, fr. Saturnus] (1591) 1 cap: the festival of Saturn in ancient Rome beginning on Dec. 17
2. sing, pl saturnalias also saturnalia a: an unrestrained often licentious celebration: orgy b: excess, extravagance -- sat.ur.na.lian adj -- sat.ur.na.lian.ly adv