- a container in which things are boiled or heated
- a tank in which water is turned to steam for heating or for power, as in a steam engine
- a tank for heating water and storing it
See boiler in American Heritage Dictionary 4
- An enclosed vessel in which water is heated and circulated, either as hot water or as steam, for heating or power.
- A container, such as a kettle, for boiling liquids.
- A storage tank for hot water.
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