Pronunciation: (spir'i-chOO-u-liz"um),[key] —n. 1. the belief or doctrine that the spirits of the dead, surviving after the mortal life, can and do communicate with the living, esp. through a person (a medium) particularly susceptible to their influence.
2. the practices or phenomena associated with this belief.
3. the belief that all reality is spiritual.
4. Metaphys.any of various doctrines maintaining that the ultimate reality is spirit or mind.
5. spiritual quality or tendency.
6. insistence on the spiritual side of things, as in philosophy or religion.