undervolt noun 1verb 1forms 3 noun1 •A 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. — 2011 verb1 •To reduce the voltage of (a component) below the normal level.If the lamp is undervolted the burning rate of the carbons will decrease and they will tend to feed together, but as they approach each other the arc is shortened and the arc voltage drops. — 1947 formsundervolted · undervolting · undervolts
