a state of physical, mental, and/or emotional collapse and exhaustion caused by being stressed, overworked, or frustrated for an extended period of time;
e.g. He was struggling with burnout after working long hours at a stressful job.
(noun)
the point at which a device or machine stops functioning/operating due to overheating;
e.g. She drove the motor to burnout, causing the device to stop working.
(noun)
(informal American) a person who abuses an addictive drug;
e.g. He realized he was becoming a burnout and decided to seek professional help.