General anesthesia: a combination of medications administered by a physician anesthesiologist that put patients in a sleep-like state before surgery. While under general anesthesia, a patient is unconscious and feels no pain. General anesthesia is usually given through a mask or intravenously (IV) by a needle placed in a vein, and an anesthesiologist monitors heart rate, blood pressure, breathing, and other vital signs.
From 
References
General Anesthesia. American Society of Anesthesiologists. 2020.
<https://www.asahq.org/whensecondscount/anesthesia-101/types-of-anesthesia/general-anesthesia>
<https://www.asahq.org/whensecondscount/anesthesia-101/types-of-anesthesia/general-anesthesia>