Rio de Janeiro is a city.
Rio de Janeiro -LRB- -LSB- ˈriːoʊ_di_ʒəˈnɛəroʊ , _ - deɪ_ʒə - , _ - də_dʒə - -RSB- -LSB- ˈʁi.u d -LRB- ʒi -RRB- ʒɐˈnejɾu -RSB- ; River of January -RRB- , or simply Rio , is the second-most populous municipality in Brazil and the sixth-most populous in the Americas.
