Lewis & Short

fātālis, e, adj. [fatum], of or belonging to fate, ordained by fate or destiny, decreed, destined, fated, fatal (class.).

  1. I. In gen.: illa fatalis necessitas, quam εἱμαρμένην dicitis, Cic. N. D. 1, 20, 55: fatalis et immutabilis continuatio ordinis sempiterni, id. Ac. 1, 7, 29: summam fatalem conficere, id. Rep. 6, 12: divina aique fatalia, id. Part. 21, 73: casus, id. Phil. 6, 7, 19: consulatus ad salutem rei publicae prope fatalis, id. Cat. 4, 1, 2; cf.: hic annus fatalis ad interitum hujus urbis, id. ib. 3, 4, 9: anni, Tib. 1, 3, 53; Inscr. Orell. 4851: stamina, Tib. 1, 7, 1; Ov. M. 8, 452; cf. deae, i. e. the Fates, id. P. 1, 8, 64: libri, i. e. the Sibylline, Liv. 5, 14, 4; 5, 5, 11; Suet. Caes. 79 al.: verba, Ov. F. 4, 257: lex, i. e. fatum, id. M. 3, 316; 10, 203: labor, Hor. Ep. 2, 1, 11: ora fluminis, destined, Ov. M. 15, 54: mala. Suet. Ner. 40: mors, a natural death, Vell. 2, 4, 6; Plin. Ep. 1, 12, 1; cf.: mors fato propera, Tac. A. 1, 3.
    In neutr. fatale est, with a subject-clause: tam fatale est, medicum adhibere, quam convalescere, Cic. Fat. 13, 30: quasi fatale esset, non posse Gallias debellari nisi a se consule, Suet. Ner. 43.
  2. II. In partic., in a bad sense, dangerous, destructive, deadly (perh. only poet., and in post-Aug. prose): vincla, Lucr. 5, 876: telum, Verg. A. 12, 919: manus (Etruscorum), id. ib. 12, 232: jaculum, Ov. M. 5, 182: hasta, Sil. 2, 400: lignum, Ov. M. 8, 479: crinis, id. ib. 8, 85: aurum, id. ib. 9, 411: signum, id. ib. 13, 381: monstrum, Hor. C. 1, 37, 21: judex, id. ib. 3, 3, 19: hora, Suet. Ner. 49: DIES, dying-day, Inscr. Orell. 3023; 4758; cf.: si quid mihi fatale contigerit, Spart. Hadr. 4.
    Hence, fātālĭter, adv., according to fate, fatally: omnia, quae fiunt quaeque futura sunt, ex omni aeternitate definita dicis esse fataliter, * Cic. Div. 2, 7, 19; Suet. Caes. 59; Tac. H. 1, 71; Ov. M. 12, 67: mori, to die a natural death, Eutr. 1, 11.