The Collaborative International Dictionary of English v.0.48:

Aviary \A"vi*a*ry\, n.; pl. Aviaries. [L. aviarium, fr.
   aviarius pertaining to birds, fr. avis bird, akin to Gr, ?,
   Skr. vi.]
   A house, inclosure, large cage, or other place, for keeping
   birds confined; a bird house.
   [1913 Webster]

         Lincolnshire may be termed the aviary of England.
                                                  --Fuller.
   [1913 Webster]

WordNet (r) 3.0 (2006):

aviary
    n 1: a building where birds are kept [syn: aviary, bird
         sanctuary, volary]