The Collaborative International Dictionary of English v.0.48:

Bahadur \Ba*ha"dur\ Bahaudur \Ba*hau"dur\, n. [Written also
   bahawder.] [Hind. bah[=a]dur hero, champion.]
   A title of respect or honor given to European officers in
   East Indian state papers, and colloquially, and among the
   natives, to distinguished officials and other important
   personages.
   [Webster 1913 Suppl.]