Definition of cosmopolitanize in US English:

cosmopolitanize

(British cosmopolitanise)

verb

[with object]
  • 1Make familiar with and at ease in many different countries and cultures.

    ‘a time when the colleges and universities of America were flooded with students cosmopolitanized to a degree by their war experiences’
    1. 1.1 Change (something) in such a way that it becomes composed of people or elements from many different countries or cultures.
      ‘transnational states that have been cosmopolitanized’

Pronunciation

cosmopolitanize

/ˌkɑzməˈpɑlətnˌaɪz//ˌkäzməˈpälətnˌīz/