A person who opposes or rejects spiritual or spiritualist beliefs and practices.
From antispiritualism + -ist (a person who practices or believes in something). The term arose in the 19th century when scientific rationalists explicitly challenged spiritualist mediums and paranormal claims.
Famous antispiritualists like Harry Houdini spent their lives exposing fake spiritualist mediums—he was actually a magician who knew all their tricks and dedicated himself to protecting people from being swindled.
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