Definition of interventionist noun from the Oxford Advanced Learner's Dictionary

 

interventionist

 noun
noun
BrE BrE//ˌɪntəˈvenʃənɪst//
 
; NAmE NAmE//ˌɪntərˈvenʃənɪst//
 
 
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a person who believes in the policy or practice of a government influencing the economy of its own country, or of becoming involved in the affairs of other countries liberal/humanitarian interventionists