Superheat can be defined as:

Superheat refers to the temperature of a vapor above its boiling point at a given pressure. In the context of refrigeration and air conditioning systems, this concept is critical for understanding the refrigeration cycle and ensuring that the compressor operates efficiently.

When a refrigerant is vaporized in the evaporator at low pressure and temperature, it absorbs heat from the surrounding environment, transitioning from a liquid to a vapor state. Superheat is important because it ensures that only vapor enters the compressor, which protects the compressor from liquid slugging and potential damage. By monitoring superheat, technicians can ascertain if the system is charged correctly and functioning efficiently.

Therefore, defining superheat as the temperature above its boiling point is accurate and reflects its importance in the effective operation of refrigeration systems.