spiritualism

noun

1. (countable, uncountable)A doctrine, opposing materialism, that claims transcendency of the divine being, the altogether spiritual character of reality and the value of inwardness of consciousness.

   “What is called spiritualism should, I think, be called a mental species of materialism.”

2. (countable, uncountable)A belief that the dead communicate with the living, especially through a medium. Used in a broader sense than spiritism.

   “I wish it were possible to impress this truth upon people who rush into spiritualism from curiosity, or who try "table rapping" or some similar phenomenon "for fun".”

3. (countable, uncountable)The quality or state of being spiritual.
4. (uncountable)A belief that spirits of the dead have both the ability and the inclination to communicate with the living, providing useful knowledge about moral and ethical issues, as well as about the nature of God.