Source : Webster's Revised Unabridged Dictionary (1913)

Burgomaster \Bur"go*mas`ter\, n. [D. burgemeester; burg borough
   + meester master; akin to G. burgemeister, b["u]rgermeister.
   See 1st {Borough}, and {Master}.]
   1. A chief magistrate of a municipal town in Holland,
      Flanders, and Germany, corresponding to mayor in England
      and the United States; a burghmaster.

   2. (Zo["o]l.) An aquatic bird, the glaucous gull ({Larus
      glaucus}), common in arctic regions.

Source : WordNet®

burgomaster
     n : a mayor of a municipality in Germany or Holland or Flanders
         or Austria