I.a nocturnal festival in honor of Bacchus, accompanied by wild bacchanalian cries, the feast or orgies of Bacchus.
B. Transf., in gen., secret frantic revels, orgies, Juv. 2, 91; Stat. S. 5, 5, 4.—
II. Trop.: “Itala per Graios Orgia ferre choros,” the mysteries of love in the Latin tongue, Prop. 4, 1, 4: “naturae,” secrets, mysteries, Col. 10, 217.