Definition

1. Noun:
   • A secondary or backup engine, typically smaller than the main engine, used to power specific equipment or systems, especially on a ship or boat. Its primary function is to provide power when the main engine is not running or to operate auxiliary machinery.

Examples of Usage

• Noun:
  • The ship's auxiliary engine powered the winches and the electrical generator while in port.
  • During the main engine failure, the crew relied on the auxiliary engine to maintain critical systems.
  • Modern yachts often have a small auxiliary engine for maneuvering in harbors.

Advanced Usage

• "to start/run the auxiliary engine": To activate or operate the secondary engine.
  • The captain ordered the engineer to start the auxiliary engine to power the bilge pumps.
• "auxiliary engine room": A compartment, often smaller, housing the secondary engine and its related systems.
  • The fire was contained in the auxiliary engine room.

Variants and Related Words

• Auxiliary (adjective): Providing supplementary or additional help and support.
  • The auxiliary power unit started automatically.
• Donkey engine (noun): A synonym, historically used for a small auxiliary engine on a ship.
• Generator (noun): A related device often powered by an auxiliary engine to produce electricity.

Synonyms

• Backup engine
• Secondary engine
• Donkey engine (nautical)

Related Phrases

• Auxiliary power: Electrical or mechanical power supplied by a secondary source like an auxiliary engine.
  • The vessel switched to auxiliary power during the storm.

Noun

1. (nautical) a small engine (as one used on board ships to operate a windlass)