External combustion engines are heat engines where a fuel is burned outside the engine, and the heat is then used to boil a liquid (usually water) and create steam. The steam is then used to drive the engine's pistons. Examples of external combustion engines include steam engines and Stirling engines.
Turbines, on the other hand, are a type of rotary engine that uses the energy of a moving fluid to turn a rotor. Turbines are used in a wide variety of applications, including jet engines, gas turbines, and wind turbines.
