reviver

Reviver is a noun derived from revive. It denotes a person or thing that brings something back to life, consciousness, or operating condition after a period of inactivity or failure. The term is broad and informal; in professional contexts, more precise terms such as rescuer, resuscitator, restorer, or reboot mechanism are often used.

In medicine and emergency response, a reviver can be a person who helps revive someone who is unconscious or not breathing, for example by performing CPR or using an automated external defibrillator (AED). It can also refer to devices that aid revival, such as ventilators or life-support systems that restore breathing or circulation. The aim is to stabilize a patient and maintain vital functions until definitive treatment is available.

In technology and engineering, reviver describes a mechanism or process that restarts or recovers a system after a fault, crash, or outage. In fiction and popular culture, 'Reviver' may appear as a title or character name, though such uses are specific to a work and not a general definition.

See also resuscitation, revival, reanimation.