Refers to an ideology or attitude that seeks to exclude certain groups, ideas, or influences. Often used in political, social, or religious contexts.
The party's exclusionist policies drew criticism.
Exclusionism is a way of thinking that does not accept diversity.
排他主義 is a more common synonym for exclusionism, often used in similar contexts. 排除主義 is less frequent but carries the same meaning.
排除 is the base noun meaning 'exclusion' or 'removal'. 排除主義 adds the suffix 主義 to form an ideology noun.
Compound of 排除 (exclusion) + 主義 (principle, -ism). The exact historical derivation is uncertain, but it follows the standard pattern for forming ideological terms in modern Japanese.