What does Chikatetsu no eki mean?

"Chikatetsu no eki" (地下鉄の駅) directly translates to "Subway station" in Japanese.

* 地下鉄 (chikatetsu) means "subway"

* の (no) is a possessive particle, indicating that the station belongs to the subway

* 駅 (eki) means "station"

Therefore, "Chikatetsu no eki" simply refers to a station that is part of the subway system.