v. t. [ imp. & p. p. Superheated; p. pr. & vb. n. Superheating. ] 1. To heat too much, to overheat; as, to superheat an oven. [ 1913 Webster ]

2. (Steam Engine) To heat, as steam, apart from contact with water, until it resembles a perfect gas. [ 1913 Webster ]

3. To heat (a liquid) above its boiling point without converting it into vapor. [ Webster 1913 Suppl. ]

n. The increase of temperature communicated to steam by superheating it. [ 1913 Webster ]

heated to a temperature above the boiling point at the ambient pressure; -- said of liquids. In such an unstable condition, a small disturbance of the liquid can cause a rapid and sometimes violent ebullition of vapor. [ PJC ]

n. (Steam Engine) An apparatus for superheating steam. [ 1913 Webster ]