Source : Webster's Revised Unabridged Dictionary (1913)

Belgian \Bel"gi*an\, a.
   Of or pertaining to Belgium.

Belgian \Bel"gi*an\, a.
   Of or pertaining to Belgium. -- n. A native or inhabitant of
   Belgium.

Source : WordNet®

Belgian
     n : a native or inhabitant of Belgium

Belgian
     adj : of or relating to or characteristic of Belgium or the
           Belgian people; "the Belgian Queen"