Source : Webster's Revised Unabridged Dictionary (1913)

Hamburg \Ham"burg\, n.
   A commercial city of Germany, near the mouth of the Elbe.

   {Black Hamburg grape}. See under {Black}.

   {Hamburg edging}, a kind of embroidered work done by
      machinery on cambric or muslin; -- used for trimming.

   {Hamburg lake}, a purplish crimson pigment resembling
      cochineal.

Source : WordNet®

Hamburg
     n : a city in northern Germany on the Elbe River