the GNU version of the Collaborative International Dictionary of English
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.
verb.
Simple past tense and past participle of superheat.
adjective.heated above the boiling point;
adjective.exceedinglyintense or emotional.
Word Usage
"Yes, it is true that a vessel of water heated in a microwave can be superheated, that is, the temperature of the water can be above its spontaneous boiling point."