D defs.my
Entry 1 sense Webster, 1913

Steamboat

/(-bōt`)/ · Steam·boat · IPA /ˈstimˌboʊt/
01 n. A boat or vessel propelled by steam power; -- generally used of river or coasting craft, as distinguished from ocean steamers.
  1. 1.
    A boat or vessel propelled by steam power; -- generally used of river or coasting craft, as distinguished from ocean steamers.