Source : Webster's Revised Unabridged Dictionary (1913)

Dingey \Din"gey\, Dingy \Din"gy\, Dinghy \Din"ghy\, n. [Bengalee
   dingi.]
   1. A kind of boat used in the East Indies. [Written also
      {dinghey}.] --Malcom.

   2. A ship's smallest boat.

Source : WordNet®

dinghy
     n : a small boat of shallow draft with cross thwarts for seats
         and rowlocks for oars with which it is propelled [syn: {dory},
          {rowboat}]