boiler

US /ˈbɔɪ.lɚ/
UK /ˈbɔɪ.lɚ/
"boiler" picture
1.

a fuel-burning apparatus or container for heating water

:
The old boiler in the basement needs to be replaced.
We had no hot water because the boiler broke down.
2.

a strong metal container in which water is heated to make steam, for example in a steam engine

:
The steam locomotive's boiler was a marvel of engineering.
Safety regulations are strict for industrial boilers.