This is the 63rd most frequent Indonesian word.
selatan
"South."
Here, 'selatan' is used to denote a cardinal direction (south).
Negara Indonesia berada di belahan selatan dunia.
Indonesia is situated in the southern part of the world.
In this sentence, 'selatan' specifies a particular region within a larger area.
Dia tinggal di daerah selatan kota.
He lives in the southern part of the city.
Here, 'selatan' is part of a proper noun, giving a specific name to a location.