Source : Webster's Revised Unabridged Dictionary (1913)

Austrian \Aus"tri*an\, a.
   Of or pertaining to Austria, or to its inhabitants. -- n. A
   native or an inhabitant of Austria.

Source : WordNet®

Austrian
     n : a native or inhabitant of Austria

Austrian
     adj : of or relating to Austria or its people or culture;
           "Austrian music"