See more synonyms for heater on Thesaurus.com
  1. any of various apparatus for heating, especially for heating water or the air in a room.
  2. Electronics. the element of a vacuum tube that carries the current for heating a cathode.
  3. Slang. a pistol, revolver, or other firearm.

Origin of heater

First recorded in 1490–1500; heat + -er1
Related formsre·heat·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for heater

stove, oven, furnace, radiator, boiler, fastball, pistol, convector, etna, gat

Examples from the Web for heater

Contemporary Examples of heater

  • The two were sitting in front of a heater one November afternoon when Apple had a eureka moment.

    The Daily Beast logo
    The Original Apple Icon

    Anthony Haden-Guest

    October 6, 2010

  • "We had bedbugs before they were cool, before they were hip," says Heater.

    The Daily Beast logo
    Vigilante Bedbug Exterminators

    Brian Ries

    August 27, 2010

Historical Examples of heater

British Dictionary definitions for heater


  1. any device for supplying heat, such as a hot-air blower, radiator, convector, etc
  2. US slang a pistol
  3. electronics a conductor carrying a current that indirectly heats the cathode in some types of valve
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for heater

c.1500, of persons, agent noun from heat. Of devices, from 1660s. Baseball slang meaning "fastball" is attested by 1985.

Online Etymology Dictionary, © 2010 Douglas Harper