- a machine for converting thermal energy into mechanical energy or power to produce force and motion.
- a railroad locomotive.
- a fire engine.
- a piece or collection of software that drives a later process (used in combination, as in game engine; software engine).
- any mechanical contrivance.
- a machine or instrument used in warfare, as a battering ram, catapult, or piece of artillery.
- a means by which something is achieved, accomplished, or furthered: Trade is an engine of growth that creates jobs, reduces poverty, and increases economic opportunity.
- an instrument of torture, especially the rack.
- any machine designed to convert energy, esp heat energy, into mechanical work
- a railway locomotive
- (as modifier)
- any of various pieces of equipment formerly used in warfare, such as a battering ram or gun
- any instrument or device
