Rio de Janeiro

geographical name

Rio de Ja·​nei·​ro ˈrē-(ˌ)ō-dā-zhə-ˈner-(ˌ)ō 

-dē-;

ˈrē-ü-dē-zhä-ˈnā-rü

1

state of southeastern Brazil bordering the South Atlantic area 16,903 square miles (43,780 square kilometers), population 15,989,929

2

city and port on Guanabara Bay in southeastern Brazil that is the capital of the state of Rio de Janeiro and is the former capital of Brazil population 6,320,446