in ‧ ter ‧ na ‧ tion ‧ al ‧ is ‧ m /ˌɪntəˈnæʃ ə nəlɪz ə m $ -tər-/ BrE AmE noun [uncountable]
[ Word Family: noun : ↑ nation , ↑ national , ↑ multinational , ↑ nationalism , ↑ nationalist , ↑ nationality , ↑ nationalization , ↑ nationhood , ↑ international , ↑ internationalism , ↑ internationalist , ↑ internationalization ; adjective : ↑ national , ↑ international , ↑ multinational , ↑ nationalist , ↑ nationalistic , nationalized, ↑ internationalist ; verb : ↑ nationalize , ↑ internationalize ; adverb : ↑ nationally , ↑ internationally ]
the belief that nations should work together and help each other
—internationalist noun [countable]
—internationalist adjective