steam engine

steam engine (plural steam engines)

2. Any heat engine that uses steam as its primary working fluid to do mechanical work.

   Hypernyms: engine < device, machine

   Hyponym: steam turbine

   2. (usually) A piston engine driven by steam.

      Coordinate term: steam turbine

4. (especially British) A steam locomotive.

• overhead engine

• boiler (steam boiler) (what supplies steam to the engine or turbine)

• portable engine
• traction engine