donkey boiler is a noun meaning "(nautical) an extra boiler (as a ship's boiler that is used while the ship is in port)". It carries one recorded sense.
(nautical) an extra boiler (as a ship's boiler that is used while the ship is in port)
ship
Definitions, synonyms and semantic relations for donkey boiler come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.