'Flatboat' definitions:

Definition of 'flatboat'

From: WordNet
noun
A flatbottom boat for carrying heavy loads (especially on canals) [syn: barge, flatboat, hoy, lighter]

Definition of 'Flatboat'

From: GCIDE
  • Flatboat \Flat"boat`\, n. A boat with a flat bottom and square ends; -- used for the transportation of bulky freight, especially in shallow waters. [1913 Webster] flat-bottom