01 n. The doctrine that immaterial substances or spiritual being exist, or are possible.
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1.
The doctrine that immaterial substances or spiritual being exist, or are possible.
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2.
The doctrine that external bodies may be reduced to mind and ideas in a mind; any doctrine opposed to materialism or phenomenalism, esp. a system that maintains the immateriality of the soul; idealism; esp., Bishop Berkeley's theory of idealism.(Philos.)