Source : Webster's Revised Unabridged Dictionary (1913)

Rowboat \Row"boat`\, n.
   A boat designed to be propelled by oars instead of sails.

Source : WordNet®

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