1. internationalist

noun. (ˌɪntɝˈnæʃənəlɪst, ˌɪnɝˈnæʃənəlɪst) A member of a socialist or communist international.

3. internationalist

adjective. (ˌɪntɝˈnæʃənəlɪst, ˌɪnɝˈnæʃənəlɪst) Influenced by or advocating internationalism.