undervoltEtymologyFrom under- + volt.nounA significant drop in voltage.“For all she knew, there would be an EMP or a power outage or an undervolt, and she'd lose everything she'd just done.”verbTo reduce the voltage of (a component) below the normal level.“A voltage curve which slopes, having a 33%-50% difference between the commencing and final values, makes the source of power from which it emanates unsuitable for some purposes owing to the necessity for either constant adjustment of the circuit values or overvolting the circuit to start with, with undervolting towards the end of the cell's life.”