A locomotive going in advance of a train to make sure that the way is clear.

(thermodynamics) A theoretical engine that converts information into energy for use in work, decreasing heat entropy in the process. / (data processing) A data processor.

A standalone machine that combines an electrical generator with an engine.

An aeolipile.

plural of Hero engine

European qualification for engineers granted by the European Federation of National Engineering Associations (FEANI).

(engineering) The primary branch of engineering concerned with the research, design, development, construction, testing, science, and technology of aircraft and spacecraft.

plural of Otto engine

An engine using the Otto cycle.

The practice of fitting an earlier or superseded design or part to a machine etc. to achieve a specific purpose