Lewis & Short

Cimmĕrii, ōrum (gen. Cimmeriūm, Val. Fl. 3, 399; Cimmeriōn, Tib. 4, 1, 64), m., = Κιμμέριοι.

  1. I. A Thracian people in the present Crimea, on both sides of the Dnieper, whose chief town was Cimmerium, Mel. 1, 19, 15; Plin. 6, 6, 5, § 17; 6, 13, 14, § 35.
    Hence,
    1. B. Adj.
      1. 1. Cimmĕrĭus, a, um, Cimmerian: Bosporus, Plin. 4, 12, 24, § 77: litus, Ov. P. 4, 10, 1.
      2. 2. Cimmĕrĭcus, a, um, Cimmerian: oppida, Mel. 2, 1, 3.
  2. II. A fabulous people supposed to have dwelt in caves, between Baiœ and Cumœ, Fest. p. 43, 4 sq.; cf. Plin. 3, 5, 9, § 61; Cic. Ac. 2, 19, 61; Sil. 12, 132; perpetual darkness prevailed among them, Tib. 4, 1, 64; Val. Fl. 3, 398; here Somnus had his abode, Ov. M. 11, 592 sq.
    Poet., the Lower World: Cimmerii lacus, Tib. 3, 5, 24; cf. Verg. Cul. 230; v. Lidd. and Scott, under Κιμμέριοι.