This is the 4857th most frequent Korean word.
광역
"광역" means "wide area" or "metropolitan area."
In this sentence, "광역" is used to describe the higher administrative level of a city, indicating it is a metropolitan or extensive city as classified by certain governance.
서울은 광역시 중 하나입니다.
Seoul is one of the metropolitan cities.
Here, "광역" relates to a broad or expansive scale, specifically referring to a widespread or extensive transportation network.
이 지하철 노선은 광역 교통망에 포함됩니다.
This subway line is part of the metropolitan transportation network.
In this usage, "광역" suggests a comprehensive or large-scale scope, describing the system analysis that covers a wide range.