a) 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.
While it appears the FRM40_TEXT table is the answer, saving a form with boiler text does not seem to insert into this table.
b) Less commonly, a hot water heater.<! Note: the below is a more complete definition that was here previously. It borders on the encyclopedic, but Im leaving it intact, just commented-out, in case someone thinks parts of it should be incorporated into the above definitions that were created from it.
Note that Stuart Grey makes the assertion: "I think rationally on all subjects.", and then proceeds to use the standard boiler tactics and phrases of the people WHO instigate conflict and war.
Wikipedia foundation.