exclusionist Syllabification: (ex·clu·sion·ist)Pronunciation: /ikˈsklo͞oZHənist/Definition of exclusionist adjective acting to shut out or bar someone from a place, group, or privilege:an exclusionist foreign policy noun a person favoring the exclusion of someone from a place, group, or privilege. exclusionist in other Oxford dictionaries Definition of exclusionist in the British & World English dictionary