A medium is a person who channels a spirit or through whom a spirit or entity communicates. Mediums can communicate with spirits on behalf of another living being, acting as a midway point between the worlds of the living and the dead. I had a transformational experience when a medium brought through messages from my father 26 years after he had passed. For me, it completely healed our relationship.
After death communication through mediums has been documented back to early recorded history. Mediumship became popular in the U.S. and U.K. in the 19th century. During this time, mediumship generally took the form of séances held in dark rooms, an environment that led to deception and trickery. Fraudulent practitioners were exposed, and mediumship fell out of favor.