Lewis & Short

prō-tĭnus (less properly prō-tĕnus), adv. [tenus], before one’s self, forward, farther on, onward.

  1. I. Lit. (rare but class.; syn.: statim, continuo, actutum): praecepisse, ut pergeret protinus, quid retro atque a tergo fieret, ne laboraret, Cic. Div. 1, 24, 49: ipse capellas Protinus aeger ago, drive along before me, Verg. E. 1, 13: quā (voce) protinus omne Contremuit nemus, far and wide, id. A. 7, 513.
  2. II. Transf.
    1. A. Right on, continuously, constantly, uninterruptedly (rare; not in Cic.).
      1. 1. In space, Plin. Ep. 5, 6, 19: trans Lygios Gothones regnantur . . . protinus deinde ab Oceano Rugii et Lemovii, Tac. G. 43 fin.: summa (vertebra) protinus caput sustinet, Cels. 8, 1.
      2. 2. In time or order: post ad oppidum hoc vetus continuo mecum exercitum protinus obducam, Plaut. Ps. 2, 1, 13; Sisenn. ap. Non. 376, 28; Tubero, ib. 376, 32: protinus ut moneam, Hor. Ep. 1, 18, 67: trajecto missa lacerto Protinus hasta fugit servatque cruenta tenorem, Verg. A. 10, 340; id. G. 4, 1: felix si protinus illum Aequasset nocti ludum, id. A. 9, 337.
    2. B. Forthwith, immediately, directly, from the very first, instantly, on the spot (class.; but rare in prose until post-Aug. per.): oratio protinus perficiens auditorem benevolum, at the very outset, Cic. Inv. 1, 15, 20: hostes protinus ex eo loco ad flumen contenderunt, Caes. B. G. 2, 9: tu protinus unde Divitias aerisque ruam, dic, augur, acervos, Hor. S. 2, 5, 21.
      With a negative: non protinus, not immediately, Quint. 10, 1, 3.
      With ex or ab, immediately or directly after: ex fugā protinus auxilia discesserunt, Caes. B. G. 5, 17: protinus ab ipsā curatione, Cels. 7, 26, 5: a partu, Plin. 20, 21, 84, § 226: ab adoptione, Vell. 2, 104, 3; cf.: protinus post cibum, Cels. 7, 26, 26.
      With ut, quam, atque, as soon as, as soon as ever; with ut: protinus ut percussus est aliquis, Cels. 5, 26, 26; Val. Max. 5, 4, 4; Quint. 1, 1, 3.
      With quam, Plin. 10, 28, 40, § 75 (al. quā); 15, 17, 18, § 67.
      With atque, Sol. 46 fin.
      Prov.: Protinus ad censum, de moribus ultima flet quaestio, Juv. 3, 140.