IPA: /ˌkɒzməˈpɒlaɪt/
KK: /kɑzˈmɑpəˌlaɪt/
A person who is familiar with and at ease in many different countries and cultures.
As a cosmopolite, she felt comfortable speaking multiple languages and enjoying diverse cuisines.
Cosmopolite is formed from "cosmo-" (from Greek "kosmos", meaning world or universe) and "polite" (from Greek "polites", meaning citizen). The word refers to a citizen of the world, someone who feels at home in any country.
Think of 'cosmos' as the world and 'polite' as a citizen — a cosmopolite is someone who feels like a citizen of the world.