What is the definition or description of: pinched nerve?

This term is not a : Medical one but it is interpeted to mean that there is a spinal nerve being compressed by a disc heniation usually but could also be from other causes like a degenerative change within the spine.

See below: A pinched nerve is a nerve with pressure applied to it. In the spine, a pinched nerve is usually caused by a herniated spinal disc pressing on it. Symptoms of a pinched nerve are: •weakness •tenderness.