Lewis & Short

Ĕrĕbus, i, m., = Ἔρεβος.

    1. A. The god of darkness, son of Chaos, and brother of Nox, Cic. N. D. 3, 17 fin.; Hyg. Myth. praef.; Verg. A. 4, 510; Ov. M. 14, 404.
    2. B. The Lower World, Verg. G. 4, 471 Serv.; id. A. 6, 247; 7, 140; Ov. M. 5, 543; 10, 76, al.
      Hence,
  1. II. Ĕrĕbēus, a, um, adj., of or belonging to the Lower World: colubrae, Ov. lb. 229.