Noun
The doctrine that immaterial substances or spiritual being exist, or are possible.
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.
Source: Webster's dictionaryCit.: "Let us call the thought that information might be the basic category from which all else flows informational immaterialism." Source: Internet
Subjective idealism main Subjective Idealism ( immaterialism or phenomenalism ) describes a relationship between experience and the world in which objects are no more than collections or "bundles" of sense data in the perceiver. Source: Internet
These approaches have been described as a revival of immaterialism Timpson,Op. Source: Internet