Lewis & Short

praeceptor, ōris, m. [praecipio].

  1. I. One who seizes beforehand, an anticipator (postclass.): servilium praeceptor operum (al. praereptor, al. praecerptor), Paul. Nol. Ep. 23, n. 4.
  2. II. A commander, ruler (postclass.), Gell. 1, 13, 8.
  3. III. A teacher, instructor, preceptor (class.): praeceptor tuus, qui te hanc fallaciam docuit, Plaut. Ps. 4, 7, 96: vivendi atque dicendi, Cic. de Or. 3, 15, 57: praeceptor et auctor omnium consiliorum totiusque vitae, id. Phil. 2, 6, 14: fortitudinis, id. Fam. 5, 13, 3: philosophiae, Nep. Epam. 2, 2: recti bonique, Petr. 88: ut praeceptori verborum regula constet, Juv. 7, 230.
    Of Christ: Jesu praeceptor, miserere nostri, Vulg. Luc. 17, 13 al.: nostri praeceptores putant, our authorities, Gai. Inst. 2, 219; 3, 87 et saep.