I.of favorable or fortunate omen, fortunate, favorable, auspicious, prosperous, lucky (rare but class.; cf.: “felix, fortunatus, beatus, prosperus, dexter, secundus): quae (omina) majores nostri quia valere censebant, idcirco omnibus rebus agendis: QVOD BONVM FAVSTVM FELIX FORTVNATVMQVE ESSET praefabantur,” Cic. Div. 1, 45, 102: so, “ut nobis haec habitatio Bona, fausta, felix fortunataque eveniat,” Plaut. Trin. 1, 2, 3: “utile sit faustumque precor, quod imagine somni Vidimus,” Ov. F. 3, 27: “omen,” Liv. 7, 25, 11; Ov. M. 6, 448; 9, 785 al.; cf.: “exitus ut classi felix faustusque daretur,” Lucr. 1, 100: “i pede fausto,” Hor. Ep. 2, 2, 37: “indoles Nutrita faustis sub penetralibus,” id. C. 4, 4, 26: “o faustum et felicem hunc diem!” Ter. And. 5, 4, 53; cf. Cic. Tusc. 1, 49, 118: “o nox illa fausta huic urbi!” id. Flacc. 41, 103: “annus,” Ov. F. 1, 63: “nisi tempestas indulget tempore fausto,” favorable, suitable, Lucr. 1, 805.—Hence, * fauste , adv., favorably, fortunately: “ut eis quoque hominibus ea res fauste, feliciter prospereque eveniret,” Cic. Mur. 1, 1.
faustus , a, um, adj. for favostus, from faveo; lit., favorable; hence,