Definition of nationalistic adjective from the Oxford Advanced American Dictionary

 

nationalistic

 adjective
adjective
NAmE//ˌnæʃənəˈlɪstɪk//
 
(usually disapproving)
 
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having very strong feelings of love for and pride in your country, so that you think that it is better than any other
See the Oxford Advanced Learner's Dictionary entry: nationalistic