This is the 2653rd most frequent Korean word.
성남
Seongnam: A city in Gyeonggi Province, South Korea.
In this sentence, '성남' is used as a proper noun referring to the city of Seongnam.
성남은 경기도에 위치한 도시입니다.
Seongnam is a city located in Gyeonggi Province.
Here, '성남' refers to the city and is part of the name of the municipal city hall '성남 시청'.
성남 시청 앞에서 만나기로 했습니다.
We decided to meet in front of Seongnam City Hall.
In this context, '성남' is mentioned to highlight its historical significance as a city.