British spelling: having been made cosmopolitan; showing worldwide influence, appeal, or adopting cosmopolitan values and perspectives.
From cosmopolitanise + -d (past tense/adjective suffix). The past participle functions as an adjective describing something that has undergone the process of becoming cosmopolitan.
A cosmopolitanised person has experienced other cultures so deeply that they no longer feel they belong to just one nation—they see themselves as a citizen of the world, which can be liberating but also means feeling like a stranger everywhere.
Complete word intelligence in one call. Free tier — 50 lookups/day.