Definition of engine noun from the Oxford Advanced American Dictionary

      

    engine

     noun
    noun
    NAmE//ˈɛndʒən//
     
     
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  1. 1the part of a vehicle that produces power to make the vehicle move a diesel/gasoline engine My car had to have a new engine. engine trouble Iturned the engine off. see also internal-combustion engine, jet engine, traction engine
  2. 2(also locomotive) a vehicle that pulls a train
  3. 3-engined (in adjectives) having the type or number of engines mentioned a twin-engined speedboat see also fire engine, search engine
  4. 4engine of something something that causes a particular process to start and keep going Exports used to be the engine of growth.
See the Oxford Advanced Learner's Dictionary entry: engine