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English definition of “engine”

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engine

noun [C]  /ˈen·dʒən/ us  
a machine that uses the energy from fuel or steam to produce movement: The car has a four-cylinder engine. fig. The health-care industry has been an engine of growth. The plane was forced to land because of engine problems. An engine (also ( also locomotive)) is a separate part of a train that pulls the other parts of the train.
(Definition of engine from the Cambridge Academic Content Dictionary © Cambridge University Press)
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