IPA: //suːprəˈnæʃənl//
KK: /suːprəˈnæʃənl/
Relating to or involving multiple countries or nations, especially in a way that goes beyond their individual borders or governments.
The European Union is an example of a supranational organization that allows countries to work together on common issues.
Supranational is formed from "supra-" (meaning above or beyond) and "national" (from Latin "natio", meaning nation or people). The word refers to something that exists or operates above the level of individual nations.
Think of 'above' ('supra-') and 'nation' — supranational means something that goes beyond individual nations.