The Collaborative International Dictionary of English v.0.48:

Auditory \Au"di*to*ry\, a. [L. auditorius.]
   Of or pertaining to hearing, or to the sense or organs of
   hearing; as, the auditory nerve. See Ear.
   [1913 Webster]

   Auditory canal (Anat.), the tube from the auditory meatus
      or opening of the ear to the tympanic membrane.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Auditory \Au"di*to*ry\, n. [L. auditorium.]
   1. An assembly of hearers; an audience.
      [1913 Webster]

   2. An auditorium. --Udall.
      [1913 Webster]

WordNet (r) 3.0 (2006):

auditory
    adj 1: of or relating to the process of hearing; "auditory
           processing"; "an audile person" [syn: auditory,
           audile, auditive]