Definition of "boiler"

boiler¹

/ˈbɔɪlə/

noun
plural boilers
1. A person who boils something.
2. A steam boiler.
3. An apparatus for heating circulating water or other heat transferring liquid.
4. A device consisting of a heat source and a tank for storing hot water, typically for space heating, domestic hot water etc., disregarding the source of heat.
5. A kitchen vessel for steaming, boiling or heating food.
6. A sunken reef, especially a coral reef, on which the sea breaks heavily.
7. A tough old chicken only suitable for cooking by boiling.
8. (UK, Australia, slang, derogatory) An old woman.

boiler²

/ˈbɔɪlə/

noun
plural not attested
1. (rare, informal) Boilerplate.
  Quotations
  While it appears the FRM40_TEXT table is the answer, saving a form with boiler text does not seem to insert into this table.
  1994 May 4, Glenn Nicholas, “Re: Forms4 boilerplate accessible?”, in comp.databases.oracle‎ (Usenet)
  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.
  2003 December 7, Tom Potter, "Re: Why don't more people hate Bush?", in alt.politics.democrats and other newsgroups, Usenet
  Nearly every employer in my field has similar terms (they all come out of a legal boiler mill somewhere).
  2007, Jim Casey, “Re: NRA vs Bar Assoc over guns in cars”, in tx.guns‎ (Usenet)
  Just aligning all the paragraphs of 'boiler text' is tedious but trying to insert values in alignment is impossible!
  2009 March 30, hughess7, “Re: Mail merge to PDF”, in microsoft.public.access‎ (Usenet)