Lewis & Short

servātor, ōris, m. [servo].

  1. I. One who gives attention to any thing, a watcher, observer: Olympi, Luc. 8, 171: cruentus Bebrycii nemoris, watcher, prowler, Stat. Th. 3, 352.
  2. II. Pregn., a preserver, deliverer, savior (the prevailing signif. of the word; class.): Ba. An tu veneficus? Co. Immo edepol vero hominum servator magis, Plaut. Ps. 3, 2, 84: rei publicae (opp. perditor), Cic. Planc. 36, 89; patriae, Liv. 6, 17; cf.: Romulidarum arcis servator, candidus anser, Lucr. 4, 683 Müll.: mei capitis, Cic. Planc. 42, 102: mundi, Prop. 4 (5), 6, 37: salutis, Ov. P. 4, 15, 41.
    Absol.: servatorem liberatoremque acclamantibus, Liv. 34, 50 fin.: si servasti me non ideo servator es, Sen. Ben. 2, 18, 8; Servator, like the Gr. Σωτήρ, an epithet of Jupiter, Plin. 34, 8, 19, § 74; Inscr. Grut. 18, 6.
    1. B. With abstr. objects, an observer, fulfiller of any duty (poet.); rigidi honesti, Luc. 2, 389; cf. foederis, Claud. B. Get. 496.