Lewis & Short

1. hōra, ae (archaic gen. sing. horāï, Lucr. 1, 1016.
In abl. plur. HORABVS, Inscr. Orell. 4601), f. [kindred with ὥρα; Zend yare, year; ayara, day; orig. for ϝοsara, from ϝέαρ, ver], (lit., a definite space of time, fixed by natural laws; hence, as in Greek).

  1. I. An hour.
    1. A. Lit. (among the Romans, of varying length, according to the time of year, from sunrise to sunset being reckoned as twelve hours; cf.: aetas, aevum, tempus, dies): aestiva, Mart. 12, 1, 4; cf.: viginti milia passuum horis quinque duntaxat aestivis conficienda sunt, Veg. Mil. 1, 9: horam amplius jam in demoliendo signo moliebantur, Cic. Verr. 2, 4, 43, § 95: īdem eadem possunt horam durare probantes? Hor. Ep. 1, 1, 82: ternas epistolas in hora dare, Cic. Fam. 15, 16, 1: in hora saepe ducentos versus dictabat, Hor. S. 1, 4, 9: horas tres dicere, Cic. Att. 4, 2, 4: primum dormiit ad horas tres, id. ib. 10, 13, 1: quatuor horarum spatio antecedens, Caes. B. C. 3, 79 fin.: quatuor aut plures aulaea premuntur in horas, Hor. Ep. 2, 1, 189: non amplius quam septem horas dormiebat, Suet. Aug. 78: haec (cogitatio) paucis admodum horis magnas etiam causas complectitur, Quint. 10, 6, 1: paucissimarum horarum consulatus, Plin. 7, 53, 54, § 181: hora quota est? what o’clock is it? Hor. S. 2, 6, 44: nuntiare horas, to tell the time of day, Juv. 10, 216; cf.: cum a puero quaesisset horas, Plin. 7, 53, 54, § 182; Suet. Dom. 16: si te grata quies et primam somnus in horam Delectat, Hor. Ep. 1, 17, 6: hora secunda postridie, Cic. Quint. 6, 25: quartā vix demum exponimur horā, Hor. S. 1, 5, 23: cum ad te quinta fere hora venissem, Cic. Pis. 6, 13: ea res acta est, cum hora sexta vix Pompeius perorasset, usque ad horam octavam, id. Q. Fr. 2, 3, 2: hora fere nona, id. ib.: hora diei decima fere, id. Phil. 2, 31, 77: hora fere undecima aut non multo secus, id. Mil. 10, 29: prima salutantes atque altera continet hora; Exercet raucos tertia causidicos: In quintam varios extendit Roma labores: Sexta quies lassis, septima finis erit, etc., Mart. 4, 8: post horam primam noctis. … decem horis nocturnis, Cic. Rosc. Am. 7, 19: prima noctis, Suet. Aug. 76: tribus nocturnis, id. Calig. 50: id quidem in horam diei quintam vel octavam spectare maluerint, i. e., towards that part of the heavens where the sun is at the fifth or eighth hour, Plin. 17, 11, 16, § 84; 6, 32, 37, § 202: hic tu fortasse eris diligens, ne quam ego horam de meis legitimis horis remittam, of the hours allowed to an orator, Cic. Verr. 2, 1, 9, § 25: hora partūs, the hour of one’s birth, natal hour, Suet. Aug. 94: hora natalis, Hor. C. 2, 17, 19: mortis, Suet. Dom. 14: cenae, id. Claud. 8: pugnae, id. Aug. 16: somni, id. Dom. 21 et saep.: ad horam venire, at the hour, punctually, Sen. Q. N. 2, 16: clavum mutare in horas, every hour, hourly, Hor. S. 2, 7, 10; id. C. 2, 13, 14; id. A. P. 160; Plin. Ep. 3, 17, 3.
      1. 2. Prov.
        1. a. In horam vivere, to care only for the passing hour, to live from hand to mouth, Cic. Phil. 5, 9, 25.
        2. b. Omnium horarum homo (amicus, etc.), ready, active, well disposed at all times, Quint. 6, 3, 110 Spald.; Suet. Tib. 42 (for which: C. Publicium solitum dicere, P. Mummium cuivis tempori hominem esse, Cic. de Or. 2, 67, 271).
    2. B. Transf., in plur.: hōrae, ārum, a horologe, dial, clock: cum machinatione quadam moveri aliquid videmus, ut sphaeram, ut horas, Cic. N. D. 2, 38, 97; Petr. 71; cf.: videt oscitantem judicem, mittentem ad horas, to look at the clock, Cic. Brut. 54, 200.
  2. II. Poet., in gen., time, time of year, season: tu quamcumque deus tibi fortunaverit horam, Grata sume manu, Hor. Ep. 1, 11, 22: et mihi forsan, tibi quod negarit, Porriget hora, id. C. 2, 16, 31: neu fluitem dubiae spe pendulus horae, id. Ep. 1, 18, 110: qui recte vivendi prorogat horam, id. ib. 1, 2, 41: extremo veniet mollior hora die, Prop. 2, 28 (3, 24), 16: numquam te crastina fallet Hora, Verg. G. 1, 426: sub verni temporis horam, Hor. A. P. 302; so of spring: genitalis anni, Plin. 9, 35, 54, § 107: flagrantis atrox hora Caniculae, Hor. C. 3, 13, 9: (hae latebrae) Incolumem tibi me praestant Septembribus horis, id. Ep. 1, 16, 16: arbor ipsa omnibus horis pomifera est, at all seasons, all the year round, Plin. 12, 3, 7, § 15.
  3. III. Personified: Hōrae, ārum, f., like the Gr. Ὧραι, the Hours, daughters of Jupiter and Themis, goddesses that presided over the changes of the seasons and kept watch at the gates of heaven, Ov. M. 2, 26; 118; Val. Fl. 4, 92; Stat. Th. 3, 410; Ov. F. 1, 125; 5, 217; Hyg. Fab. 183.