Lewis & Short

audītor, ōris, m. [audio], a hearer, an auditor (syn.: qui audit, discipulus).

  1. I. In gen., Cic. Or. 8, 24; 35, 122; id. N. D. 3, 1, 2; id. Brut. 51, 191; id. Att. 16, 2; Suet. Aug. 86; Vulg. Num. 24, 4; ib. Job, 31, 35; ib. Rom. 2, 13; ib. Jac. 1, 22 al. (auditores in Cic. is freq. periphrased by qui audiunt, Sest. 44; de Or. 1, 5, 17; 1, 51, 219).
  2. II. Esp., one that hears a teacher, a pupil, scholar, disciple (cf. audio, II. A. 2.): Demetrius Phalereus Theophrasti auditor, Cic. Fin. 5, 19, 54; so id. N. D. 1, 15, 38; id. Ac. 1, 9, 34; id. Div. 2, 42, 87; Sen. Contr. 4, 25 fin.; Ov. P. 4, 2, 35.
  3. III. Meton.; Varro uses auditor once of a reader of a book, as analogous to the hearing of an oral discourse, Varr. L. L. 6, § 1 Müll. (so vox of a writer: inconditā ac rudi voce memoriam servitutis composuisse, Tac. Agr. 3; cf.: epistolis obtundere, Cic. Att. 8, 1, 4).