Lewis & Short

incŭbātor, ōris, m. [incubo].

  1. I. One who lies in any place (post-class.): fani, one who sleeps in a temple, Tert. Anim. 49.
  2. II. An oppressive or unlawful possessor: inclementissimus aulae Siculae Dionysius, Macr. Somn. Scip. 1, 10: imperii tyrannus dicitur, Serv. ad Verg. A. 7, 266.