The Collaborative International Dictionary of English v.0.48:

Durbar \Dur"bar\, n. [Hind. darb[=a]r, fr. Per dar?[=a]r house,
   court, hall of audience; dar door, gate + b[=a]r court,
   assembly.]
   An audience hall; the court of a native prince; a state
   levee; a formal reception of native princes, given by the
   governor general of India. [India] [Written also darbar.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

durbar
    n 1: the room in the palace of a native prince of India in which
         audiences and receptions occur