Webster 1913 Edition



One who boils.
A vessel in which any thing is boiled.
☞ The word boiler is a generic term covering a great variety of kettles, saucepans, clothes boilers, evaporators, coppers, retorts, etc.
A strong metallic vessel, usually of wrought iron plates riveted together, or a composite structure variously formed, in which steam is generated for driving engines, or for heating, cooking, or other purposes.
☞ The earliest steam boilers were usually spheres or sections of spheres, heated wholly from the outside. Watt used the wagon boiler (shaped like the top of a covered wagon) which is still used with low pressures. Most of the boilers in present use may be classified as plain cylinder boilers, flue boilers, sectional and tubular boilers.
Barrel of a boiler
the cylindrical part containing the flues.
Boiler plate
Boiler iron
plate or rolled iron of about a quarter to a half inch in thickness, used for making boilers and tanks, for covering ships, etc.
Cylinder boiler
one which consists of a single iron cylinder.
Flue boilers
are usually single shells containing a small number of large flues, through which the heat either passes from the fire or returns to the chimney, and sometimes containing a fire box inclosed by water.
Locomotive boiler
a boiler which contains an inclosed fire box and a large number of small flues leading to the chimney.
Multiflue boiler
Same as
Tubular boiler
, below.
Sectional boiler
a boiler composed of a number of sections, which are usually of small capacity and similar to, and connected with, each other. By multiplication of the sections a boiler of any desired capacity can be built up.
Tubular boiler
a boiler containing tubes which form flues, and are surrounded by the water contained in the boiler. See Illust.
of Steam boiler
, under
Tubulous boiler
See under
. See
, 6, and 1st

Webster 1828 Edition



A person who boils.
A vessel in which any thing is boiled. A large pan, or vessel of iron, copper or brass, used in distilleries, pot-ash works and the like, for boiling large quantities of liquor at once.

Definition 2024



See also: boiler



Boiler m (genitive Boilers, plural Boiler)

  1. (tank-type) water heater




See also: Boiler



boiler (plural boilers)

  1. A steam boiler.
  2. An apparatus for heating circulating water or other heat transferring liquid.
  3. 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.
  4. A kitchen vessel for steaming, boiling or heating food.
  5. A sunken reef, especially a coral reef, on which the sea breaks heavily.
  6. (Britain, informal) A tough old chicken only suitable for cooking by boiling.
Derived terms

See also

Etymology 2

Shortening of boilerplate


boiler (plural not attested)

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