An engine is a device that converts some form of energy into mechanical energy.

Engine may also refer to:

Thermodynamics Heat engine, a physical or theoretical device that converts thermal energy to mechanical output Reciprocating engine, a heat engine that uses one or more pistons Internal combustion engine, an engine in which the combustion of fuel and an oxidizer occurs in a confined space Diesel engine Wankel engine Pulse jet engine, an internal combustion engine wherein the combustion occurs in pulses External combustion engine, an engine where an internal fluid is heated through the engine wall or a heat exchanger Steam engine Carnot heat engine, a hypothetical engine that operates on the reversible Carnot cycle Stirling engine, a closed-cycle regenerative hot-air engine

Rail transport Locomotive, the car of a train that carries the actual engine(s) and pulls/pushes the rest of the train Electric locomotive

Computing Software Software engine, a core component of a complex software system Browser engine, the web browsers component that renders web pages JavaScript engine, the web browser component that executes a page's JavaScript code Chess engine, for computer chess games Database engine Game engine, for video games Polymorphic engine or mutation engine, a common component of malware Search engine, an Internet service that provides information and links to relevant websites

Other Engine (computer science), a construct providing timed preemption Analytical engine, a 19th century design proposed by Charles Babbage for a mechanical computer Difference engine, a mechanical calculator designed to tabulate polynomial functions

Literature The Engine, a fictional device described in Gulliver's Travels by Jonathan Swift Engines (book), a 1959 science book for children by L. Sprague de Camp

Music Engine (British band), a British boogie-rock band (1979 to 1997) Engine (American band), an American metal band fronted by Ray Alder Engine (Engine album), 1999 Engine (American Music Club album), 1987 Engine (Jinn album), 2010 Engine (Loudness album), 1999 Engine (TNT album), 2010 "Engine", a song by Luminous from Luminous in Wonderland, 2022

Television Engine (TV series), a Japanese drama starring Takuya Kimura Engines (Engine Sentai Go-onger), fictional machines in the TV series Engine Sentai Go-onger

Other uses The Engine (organization), an MIT founded nonprofit deep tech ecosystem developer and coworking space operator Engine (organization), an American nonprofit organization encouraging high-tech entrepreneurship Fire engine, a vehicle used by firefighters Siege engine, an anti-fortification machine or structure

See also Motor (disambiguation), a device which converts electrical or hydraulic energy into motion Fire apparatus, a vehicle used to assist in fighting fires ingen (disambiguation) NGEN (disambiguation) Machine (disambiguation) Template engine (disambiguation)