noun motor that converts thermal energy to mechanical work.
noun something used to achieve a purpose.
noun a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks.
— synonyms: locomotive, locomotive_engine, railway_locomotive
noun an instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc..
Examples
“a graphics engine”
“Vessels are often built by one firm and engined by another.”