devotion to the interests or culture of a particular nation including promoting the interests of one country over those of others; "nationalist aspirations"; "minor nationalistic differences"
If you describe someone as nationalistic, you mean they are very proud of their nation. They also often believe that their nation is better than any other nation, and in this case it is often used showing disapproval. the nationalistic pride of the Catalan people. someone who is nationalistic believes that their country is better than other countries patriotic