ETYM Pref. inter- + national: cf. French international.
Concerning or belonging to all or at least two or more nations.

International revolutionary socialist anthem; composed 1870 and first sung 1888. The words by Eugčne Pottier (1816–1887) were written shortly after Napoleon III's surrender to Prussia; the music is by Pierre Degeyter. It was the Soviet national anthem 1917–44.A revolutionary socialist anthem.