12 letters · 18 points in Scrabble
noun a sophisticated person who has travelled in many countries
adjective growing or occurring in many parts of the world
adjective composed of people from or at home in many parts of the world; especially not provincial in attitudes or interests; - T.B. Macaulay
originFrom cosmopolit(e) + -an. Compare metropolitan and megalopolitan.
Etymology from Wiktionary, CC BY-SA 3.0