Definition of Boiler

1. Noun. Sealed vessel where water is converted to steam.

Exact synonyms: Steam Boiler
Specialized synonyms: Auxiliary Boiler, Donkey Boiler
Member holonyms: Boilerplate
Group relationships: Heat, Heating, Heating Plant, Heating System, Steam Engine
Terms within: Steam Whistle
Generic synonyms: Vessel
Derivative terms: Boil, Boil

2. Noun. A metal pot for stewing or boiling; usually has a lid.
Exact synonyms: Kettle
Generic synonyms: Pot
Specialized synonyms: Teakettle
Derivative terms: Boil

Definition of Boiler

1. n. One who boils.

2. n. A sunken reef; esp., a coral reef on which the sea breaks heavily.

Definition of Boiler

1. Noun. An apparatus that generates heat (usually by burning fuel) and uses it to heat circulating water (or sometimes another liquid) in a closed system that is then used for space heating, swimming pool heating, or domestic hot water or industrial processes. ¹

2. Noun. ''Less commonly'', a hot water heater.