Lewis & Short

littĕrātor (lītĕr-), ōris, m. [littera].

  1. * I. A teacher of reading and writing, an elementary instructor: litterator ruditatem eximit, grammaticus doctrinā instruit, App. Flor. p. 363, 5.
  2. II. Transf., a grammarian, critic, philologist, Cat. 14, 9; Mart. Cap. 3, § 229; cf. Kopp ad loc.
    1. B. In opp. to litteratus (a man of real learning), a smatterer, sciolist: alter litterator fuit, alter litteras sciens, Gell. 18, 9, 2; cf. id. 16, 6: Suet. Gram. 4.