I.a punisher, avenger, revenger.
I. In gen. (class.): “conjurationis investigator atque ultor,” Cic. Sull. 30, 85: “Publius nostrarum injuriarum ultor,” id. Brut. 77, 268; id. Pis. 10, 23: “exoriare aliquis nostris ex ossibus ultor,” Verg. A. 4, 625.—Attributively, Ov. Ib. 340: “deus ultor = Anteros,” id. M. 14, 750: “ultores dii,” Tac. H. 4, 57: “ultore ferro,” Just. 4, 18, 5: “ultores ignes,” Prop. 4, 1, 115; Sil. 2, 495.—
II. Ultor, a surname of Mars, the Avenger, Ov. F. 5, 577; Tac. A. 3, 18; Suet. Aug. 21; 29; id. Calig. 24 fin.; Inscr. Grut. 121, 9; 232 med.; 317, 8.