what does auxiliary engine mean?

AUXILIARY ENGINE as NOUN

Meaning
- (nautical) a small engine (as one used on board ships to operate a windlass)
Synonym(s)
- donkey engine (what does donkey engine mean?)
Hypernyms(s) auxiliary engine is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- engine (what does engine mean?)