(adj.adj.) : audītōrĭus, a, um, adj.auditor
* Relating to a hearer or hearing.
* As adj. only once: cavernae,the auditory passages,Cael. Aur. Tard. 2, 3.—Far more freq.
* Subst.: audītōrĭum, ii, n.
* A hearing of a cause at law, a judicial examination (cf. audio, II. A. 3.), Dig. 4, 8, 41.
* The place where something (a discourse, a lecture) is heard, a lecture-room, hall of justice (not in Cic.; perh. in gen. not before the Aug. period): cujus rei gratiā plenum sit auditorium,Quint. 2, 11, 3: domum mutuatur et auditorium exstruit etc.,Tac. Or. 9; 10; 39: nonnulla in coetu familiarium velut in auditorio recitavit,Suet. Aug. 85; id. Tib. 11; id. Claud. 41; id. Rhet. 6; * Vulg. Act. 25, 23; Dig. 42, 1, 54; 49, 9, 1; 4, 4. 18 al.—Trop., of the forum: non rudibus dimicantes nec auditorium semper plenum,Tac. Or. 34.
* A school, in opp. to public life: condicio fori et auditorii,Quint. 10, 1, 36.
* The assembled hearers themselves, the audience, auditory: nuper adhibito ingenti auditorio,Plin. Ep. 4, 7; so App. Mag. p. 320, 33.

s. TLL