1. the state of being superheated.
2. the amount of superheating.
1. to heat to an extreme degree or to a very high temperature.
2. to heat (a liquid) above its boiling point without the formation of bubbles of vapor.
3. 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.