Lewis & Short

2. Augustus, i, m. [1 augustus].

  1. I. A surname of Octavius Cœsar after he attained to undivided authority (acc. to Ov F 1, 590, after the year of Rome 727, Id. Jan.), and, after him, of all the Roman emperors; equivalent to Majesty or Imperial Majesty (cf. Suet. Aug. 7; Flor 4, 12 fin., Dio Cass. 53, 16: ἐξ οὗπερ καὶ Σεβαστὸν αὐτον και ἑλληνίζοντές πως ῶσπερ τινὰ σεπτὸν ἀπὸ τοῦ σεβάζεσθαι προσεῖπον), Hor C, 1, 12; 4, 5; 4, 14; 4, 15; id. Ep. 2, 1 al.; Ov M 15, 860; id. F. 1, 590; 4, 676; 5, 567, Vulg. Luc. 2, 1; ib. Act. 25, 21; 25, 25 et saep.; later: semper Augustus, Symm Ep. 2, 30 al.
    Hence,
  2. II. Adj.: Augustus, a, um, of or relating to Augustus or the emperor, Augustan, imperial caput, i. e. Augustus, Ov. M. 15, 869: aures, id. P 1, 2, 117 forum, id. ib. 4, 5, 10: postes, id M 1, 562: domus, id. P. 2, 2, 76: Principis augustā Caprearum in rupe sedentis, Juv 10, 93 Jahn (where Hermann reads angusta) pax, Ov. P. 2, 5, 18; Vell 2, 126: cohors, Vulg. Act. 27, 1 et saep.: marmor (in Egypt), Plin. 36, 7, 11, § 55 (cf Isid. Orig. 16, 5, 4; Au gusteum): laurus, also called regia, the best species of it, Plin. 15, 30, 39, § 129, 17, 10, 11, § 60: flcus, Macr S. 2, 16.
    But esp Men. sis Augustus, the month of August, named after Augustus; earlier called Sextilis (cf Macr. S. 1, 12 fin., and Julius fin.), Juv 3, 9: Katendae, Col. 11, 12; Plin. 2, 47, 47, § 123 al.: Idus, Mart. 12, 68 et saep.
    Augusta aula, i. e. Domitiani, Mart. 7, 40 historia, the history of the Roman emperors, Vop Tac. 10.
    In gen., imperial, royal. ma. trem regis ex augusto deposuit imperio, * Vulg. 2 Par. 15, 16