flat boat
2.long narrow flat-bottomed boat propelled by sculling; traditionally used on canals of Venice.
3.an open flat-bottomed boat used in shallow waters and propelled by a long pole.
4.a floating structure (as a flat-bottomed boat) that serves as a dock or to support a bridge.
5.An open, flat-bottomed boat with squared ends, propelled by a long pole and used in shallow waters.
6.A flat-bottomed boat with a pointed bow and square stern, once used on the upper Great Lakes.
7.A long, light, flat-bottomed boat with a sharply pointed bow and stern, used especially in Canada and the northeast United States.
8.A long, large, usually flat-bottomed boat for transporting freight that is generally unpowered and towed or pushed by other craft.

