HyperDic: pilot_engine

English > 1 sense of the expression *pilot engine*:
NOUN	artifact	pilot engine	a locomotive that precedes a train to check the track / track

English > *pilot engine*: 1 sense > noun 1, artifact
Meaning	A locomotive that precedes a train to check the track / track.
Broader	locomotive, engine, locomotive engine, railway locomotive	A wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks
Spanish	vagón piloto