engine








noun

  1. a machine for converting thermal energy into mechanical energy or power to produce force and motion.
  2. a railroad locomotive.
  3. a fire engine.
  4. any mechanical contrivance.
  5. a machine or instrument used in warfare, as a battering ram, catapult, or piece of artillery.
  6. Obsolete. an instrument of torture, especially the rack.

noun

  1. any machine designed to convert energy, esp heat energy, into mechanical worka steam engine; a petrol engine
    1. a railway locomotive
    2. (as modifier)the engine cab
  2. military any of various pieces of equipment formerly used in warfare, such as a battering ram or gun
  3. obsolete any instrument or deviceengines of torture
n.

c.1300, “mechanical device,” also “skill, craft,” from Old French engin “skill, cleverness,” also “trick, deceit, stratagem; war machine” (12c.), from Latin ingenium “inborn qualities, talent” (see ingenious). At first meaning a trick or device, or any machine (especially military); sense of “device that converts energy to mechanical power” is 18c., especially of steam engines.

  1. A machine that turns energy into mechanical force or motion, especially one that gets its energy from a source of heat, such as the burning of a fuel. The efficiency of an engine is the ratio between the kinetic energy produced by the machine and the energy needed to produce it. See more at internal-combustion engine steam engine. See also motor.

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