internationalist
noun [ C ]
POLITICS uk/ˌɪntəˈnæʃənəlɪst/ ussomeone who believes that countries should work together and try to understand each other:
As a lifelong internationalist, the foreign secretary understands the great value of face-to-face discussion.
internationalist
adjective POLITICS
The new young voter is internationalist, environmentalist, and technologically aware.