noun
Refers to a person who adheres to spiritualism, a belief system emphasizing the spiritual over the material. Often used in philosophical or religious contexts.
彼は精神主義者で、物質的な豊かさよりも心の平安を重視している。
He is a spiritualist who values peace of mind over material wealth.
精神主義 is the abstract concept of spiritualism, while 精神主義者 refers to a person who follows it.
Compound of 精神 (spirit, mind) + 主義 (principle, -ism) + 者 (person). The exact historical derivation is uncertain; the term follows a common pattern for forming nouns denoting adherents of a doctrine.