IPA: /ˌnɒnˈnæʃənl/
KK: /nɑnˈnæʃənl/
A person who does not belong to a particular nation or country.
The conference was attended by many nonnationals who shared their perspectives on global issues.
Nonnational → It is formed from "non-" (meaning not) and "national" (from Latin "natio", meaning birth or nation). The word "nonnational" refers to something or someone that is not associated with a specific nation.
Think of 'non-' meaning 'not' and 'national' relating to a 'nation' — so nonnational describes something that is not tied to any nation.