An unexpected, temporary, uncontrolled increase in current or voltage in an electrical circuit; a voltage spike. / An unexpected and uncontrolled increase in the output power of an engine or motor.

plural of power surge

plural of surge protector

A surge protector.

An appliance designed to protect electrical devices from voltage spikes by limiting the voltage supplied to an electric device by either blocking or by shorting to ground any unwanted voltages above a safe threshold.

plural of surge suppressor

(UK) Increased testing for, and tracing of, people with coronavirus within a particular area, in an attempt to study and limit the spread.

plural of storm surge

plural of pyroclastic surge