Lewis & Short

postis, is (abl. sing. posti, Ov. M. 5, 120), m. [pono], a post, door-post.

  1. I. Lit. (class.), Ov. Am. 2, 1, 27: caput legis in curiae poste figere, Cic. Att. 3, 15, 6: armis Herculis ad postem fixis, Hor. Ep. 1, 1, 5: cur invidendis postibus moliar atrium, id. C. 3, 1, 45: tenere postem, said of him who consecrates a temple, Liv. 2, 8; Cic. Dom. 46, 120.
    Also of other edifices: ambulationis postes nemo umquam tenuit in dedicando, Cic. Dom. 46, 121.
    1. B. Poet., transf., a door (usually in plur.): postes a cardine vellit Aeratos, Verg. A. 2, 480: aerati procumbunt cardine postes, id. ib. 493; Val. Fl. 7, 322: perunguere postis, ne quid mali medicamenti inferretur, Plin. 28, 9, 37, § 142.
      In sing.: poste recluso, Luc. 5, 531.
  2. II. Trop. (poet.): belli ferratos postes portasque refregit, Enn. ap. Serv. ad Verg. A. 7, 622 (Ann. v. 271 Vahl.): videtur Cernere res animus, sublatis postibus ipsis, i. e. the eyes, Lucr. 3, 369.