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Confidence votes 24.7K. Technically, there is no difference between an engine and a motor. However, by common usage the term 'engine' is usually applied to heat engines (e.g. internal combustion engines, steam engines, etc.) whereas the term 'motor' is more-widely applied to electric machines. + 1 other found this useful.
Freebase(0.00 / 0 votes)Rate this definition: An engine or motor is a machine designed to convert energy into useful mechanical motion. Heat engines, including internal combustion engines and external combustion engines burn a fuel to create heat, which then creates motion.