Lewis & Short

2. rĕ-sĕro, āvi, ātum, 1, v. a. [3. sero], to unlock, unclose, open (syn.: recludo, pando, aperio; class.; esp. freq. after the Aug. per.).

  1. I. Lit.: hi domos suas claudunt aut reserant, Plin. 10, 21, 24, § 49; so, fores, Tib. 1, 2, 18; 1, 8, 60; Ov. M. 10, 384: valvas, id. ib. 4, 761: postes, Tib. 1, 2, 31: limina, Verg. A. 7, 613: januam, Ov. F. 2, 455: carcerem, id. Am. 3, 2, 77; cf.: portas hosti, id. A. A. 3, 577: illi moenia, id. M. 8, 61: claustra, Sil. 7, 334: Italiam exteris gentibus, Cic. Phil. 7, 1, 2 (cf. also Italiam, Tac. H. 3, 2 fin. ex conj.): urbem reserare et pandere portas, Verg. A. 12, 584: infernas sedes (with recludere), id. ib. 8, 244: aures, Liv. 40, 8 fin.: pectus, Ov. M. 6, 663: latebras insidiarum, Amm. 14, 11, 9: urbem, to take by storm, id. 15, 8, 19.
    Poet.: simulac species patefacta est verna diei Et reserata viget genetabilis aura Favoni, Lucr. 1, 11.
  2. II. Trop.
    1. A. In gen., to open, lay open, unclose: nos ausi reserare . . . , Enn. ap. Cic. Or. 51, 171 (Ann. v. 226 Vahl.): nec ita claudenda res est familiaris, ut eam benignitas aperire non possit, nec ita reseranda, ut pateat omnibus, Cic. Off. 2, 15, 55: obsaepta diutinā servitute ora reseramus, Plin. Pan. 66 fin.: ubi, Jane biceps, longum reseraveris annum, open, begin, Ov. P. 4, 4, 23; cf.: aperire annum fastosque reserare (as consul), Plin. Pan. 58, 4: emicuit reserata dies, Val. Fl. 1, 655.
    2. B. In partic., to disclose, reveal something unknown: oracula mentis, Ov. M. 15, 145: secreta, Val. Fl. 2, 438: futura, Sil. 7, 436: operta animi, Mamert. Grat. Act. ad Julian. 17: commissa, Petr. poët. Fragm. 28, 6.