Definition of spiritualism noun from the Oxford Advanced American Dictionary

 

spiritualism

 noun
noun
NAmE//ˈspɪrətʃuəˌlɪzəm//
 
[uncountable]
 
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the belief that people who have died can send messages to living people, usually through a medium (= a person who has special powers)
See the Oxford Advanced Learner's Dictionary entry: spiritualism