exclusionistPronunciation: /ɪkˈskluːʒ(ə)nɪst, ɛk-/Definition of exclusionist adjective acting to bar someone or something from a place, group, or privilege:an exclusionist foreign policy noun a person favouring the exclusion of someone or something from a place, group, or privilege. exclusionist in other Oxford dictionaries Definition of exclusionist in the US English dictionary