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[noun soo-per-heet; verb soo-per-heet] /noun ˈsu pərˌhit; verb ˌsu pərˈhit/
the state of being superheated.
the amount of superheating.
verb (used with object)
to heat to an extreme degree or to a very high temperature.
to heat (a liquid) above its boiling point without the formation of bubbles of vapor.
to heat (a gas, as steam not in contact with water) to such a degree that its temperature may be lowered or its pressure increased without the conversion of any of the gas into liquid.
Origin of superheat
1855-60; super- + heat
Related forms
superheater, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for superheat
Historical Examples
  • It was 11AM in Florida and she was into her second glass of lemonade as the sun began to superheat the air.

    Makers Cory Doctorow
  • This more particularly applies to the electrical water, superheat and vacuum readings.

    Steam Turbines Hubert E. Collins
British Dictionary definitions for superheat


verb (transitive)
to heat (a vapour, esp steam) to a temperature above its saturation point for a given pressure
to heat (a liquid) to a temperature above its boiling point without boiling occurring
to heat excessively; overheat
Derived Forms
superheater, noun
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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superheat in Science
To heat a substance above a phase-transition temperature without the transition occurring. For example, water can be heated above its boiling point without boiling; the introduction of an impurity or physical disturbance can then trigger boiling. Superheating is an example of hysteresis. Compare supercool.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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