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[pree-heet] /priˈhit/
verb (used with object)
to heat before using or before subjecting to some further process:
to preheat an oven before baking a cake.
1895-1900; pre- + heat
Related forms
preheater, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for preheat
  • preheat the oven only long enough to reach the target temperature.
  • Letting the oven preheat excessively wastes gas, since no food is cooked.
  • When pineapple has finished cooking, preheat broiler.
  • Solar ventilation preheating systems preheat air as it enters a building to lessen the energy burden of heating applications.
  • Because of the above, preheat of engines as well as the cabin before starting is desirable in low temperatures.
  • The trend has been for longer furnaces having lower flue gas temperatures and increased combustion air preheat.
  • Less energy was required for cooling ambient air to this temperature, on an annual basis, than to preheat.
  • By using sunshine to heat or preheat your water, you can cut your water heating bill in half.
  • But a solar ventilation system can preheat the air, saving both energy and money.
  • Thermal energy drawn from the bottom layer is used to preheat boiler water for a local canning operation.
British Dictionary definitions for preheat


verb (transitive)
to heat (an oven, grill, pan, etc) beforehand
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
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Word Origin and History for preheat

also pre-heat, 1878, from pre- + heat (v.). Related: Preheated; preheating.

Online Etymology Dictionary, © 2010 Douglas Harper
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