Source : Webster's Revised Unabridged Dictionary (1913)

Yorkshire \York"shire\, n.
   A county in the north of England.

   {Yorkshire grit}, a kind of stone used for polishing marble,
      and copperplates for engravers. --Simmonds.

   {Yorkshire pudding}, a batter pudding baked under meat.

Source : WordNet®

Yorkshire pudding
     n : light puffy bread made of a puff batter and traditionally
         baked in the pan with roast beef