[what's up]

Spiritualism is, by definition, the belief that the dead speak to the living by means of a medium or a clairvoyant of some sort and/or through a seance

Not so, even though you seem to think repitition makes it so.

Oftentimes a person takes it on himself/herself to communicate with the dead. An intermediary in not necessary for spiritualism to take place.

[cothrige]

Mediums, clairvoyants and seances are the definitive part of spiritualism. It is what makes them spiritualists. The more generic belief that people can be contacted by the dead is hardly specific to spiritualism, and so not strictly such, and more to the point that has nothing to do with Catholic prayer of any kind. We believe that those alive in Christ, not the dead, can hear us, and that because they are with the Lord. It has nothing whatsoever to do with spiritualism. You seem to be equally ignorant about Christian prayer, the communion of saints and spiritualism.