Stress, he claimed, was the response of the body to any demand made on it. It wasn’t just a response to noxious injections, traumatic injuries, or brutal laboratory conditions, but to anything that requires action or adaptation. By defining stress in this way, Selye set the stage for our modern terror about stress.
From “The Upside of Stress: Why stress is good for you (and how to get good at it)”
by Kelly McGonigal