Definitions:

1. a person from Belarus or of Belarusian descent noun
   • My coworker made it a point to distinguish their country from Russia.
2. of or pertaining to Belarus or to the people or culture of Belarus adjective
   • The Belarusian delegation was on good terms with the Russian delegation.
3. the Belarusian language noun
   • The president gave a speech in Belarusian to the country's surprise.