noun the increase of temperature communicated to steam by superheating it.
2. superheat ·vt to heat too much, to overheat; as, to superheat an oven.
3. superheat ·vt to heat, as steam, apart from contact with water, until it resembles a perfect gas.
4. superheat ·add. ·vt to heat a liquid above its boiling point without converting it into vapor.