Lewis & Short

sē-cŭbo, ŭi, 1, v. n.

  1. I. To lie alone, sleep by one’s self or without a bedfellow (not in Cic.); of a man, Cat. 61, 105; Liv. 39, 10; Quint. 7, 8, 2; Suet. Tib. 7 fin.; of a woman, Tib. 1, 3, 26; Ov. Am. 3, 10, 2; id. F. 2, 328.
  2. II. In gen., to live alone or in solitude: miles depositis annosus secubat armis, Prop. 2, 25 (3, 20), 5; App. M. 2, p. 123, 31.