Lewis & Short

instĭtūtor, ōris, m. [instituo],

  1. I. a founder, creator, erector, contractor (post-class.): veteres urbium, Amm. 14, 8, 6: sordidissimorum artificiorum, Sen. Ben. 6, 17, 1: materiae, Lact. 2, 8 med.
  2. II. A teacher, instructor: morum, Treb. Pol. Trig. Tyr. 3, 1.
    Plur., Pac. Pan. 8, 5; Lampr. Commod. 1.