IPA: /ˌsʌbˈnæʃənl/
KK: /sʌbˈnæʃənl/
Relating to a division or part of a country that is below the national level, such as states or provinces.
The subnational governments have their own laws and regulations that operate within the framework of the national government.
Subnational → It is formed from "sub-" (meaning under or below) and "national" (from Latin "natio", meaning nation or people). The word refers to entities that exist under the level of a nation, such as states or provinces.
Think of something that exists 'under' ('sub-') the level of a 'nation' — that's what subnational means.