A boat or vessel propelled by steam power; -- generally used of river or coasting craft, as distinguished from ocean steamers.

a steamship used on rivers and other inland waterways.

A steam powered boat, often with a paddle wheel on the side or stern.

a boat propelled by a steam engine

A steamboat or steamship, sometimes called a steamer, is a ship in which the primary method of propulsion is steam power, typically driving a propeller or paddlewheel.