engine

1. Motor that converts thermal energy to mechanical work (synset 103292644)
   is a type of: motor - machine that converts other forms of energy into mechanical energy and so imparts motion
   subtypes:

   • aircraft engine - the engine that powers and aircraft
   • automobile engine - the engine that propels an automobile
   • auxiliary engine, donkey engine - (nautical) a small engine (as one used on board ships to operate a windlass)
   • generator - engine that converts mechanical energy into electrical energy by electromagnetic induction
   • heat engine - any engine that makes use of heat to do work
   • reaction engine, reaction-propulsion engine - a jet or rocket engine based on a form of aerodynamic propulsion in which the vehicle emits a high-speed stream
   has:

   • camshaft - an engine shaft with cams attached to it
   • gear, gearing, geartrain, power train, train - wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed
2. Something used to achieve a purpose (synset 111437675)
   "an engine of change"
   is a type of: causal agency, causal agent, cause - any entity that produces an effect or is responsible for events or results
3. A wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks (synset 103690149)
   is a type of: self-propelled vehicle - a wheeled vehicle that carries in itself a means of propulsion
   subtypes:

   • choo-choo - a child's word for locomotive
   • diesel locomotive - a locomotive driven by a diesel engine
   • dinkey, dinky - a small locomotive
   • electric locomotive - a locomotive that is powered by an electric motor
   • iron horse - (c. 1840) an early term for a locomotive
   • pilot engine - a locomotive that precedes a train to check the track
   • shunter - a small locomotive used to move cars around but not to make trips
   • steam locomotive - a locomotive powered by a steam engine
   • donkey engine, switch engine - a locomotive for switching rolling stock in a railroad yard
   • tank engine, tank locomotive - a locomotive that carries its own fuel and water; no tender is needed
   • traction engine - steam-powered locomotive for drawing heavy loads along surfaces other than tracks
   belongs to: railroad train, train - public transport provided by a line of railway cars coupled together and drawn by a locomotive
   has:

   • buffer, cowcatcher, fender, pilot - an inclined metal frame at the front of a locomotive to clear the track
   • footplate - the platform in the cab of a locomotive on which the engineer stands to operate the controls
   same as: locomotive, locomotive engine, railway locomotive
4. An instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc. (synset 103292914)
   "medieval engines of war"
   is a type of: instrument - a device that requires skill for proper use
   subtypes:

   • battering ram - a ram used to break down doors of fortified buildings
   • arbalest, arbalist, ballista, bricole, catapult, mangonel, onager, trebuchet, trebucket - an engine that provided medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles

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