1A railway or train station — the place where trains stop and passengers get on and off, including the station building, platforms, and ticket gates.
毎朝、最寄りの駅まで自転車で行きます。
Every morning I ride my bike to the nearest station.
東京駅の改札はいつも混んでいる。
The ticket gates at Tokyo Station are always crowded.
新しい駅が来月開業する予定だ。
A new station is scheduled to open next month.
ホームの端で電車を待っていたら、駅員にホーム中央へ移動するよう促された。
While I was waiting at the end of the platform for the train, a station attendant asked me to move toward the center.
2The historical sense of eki — a staging post (post town) set up along a highway in pre-modern Japan (e.g. the Edo period), providing horses and lodging for travelers and messengers. Used mainly in historical contexts today.
江戸時代、東海道には多くの駅が設けられていた。
In the Edo period, many staging posts were set up along the Tokaido highway.
3A counter used to count railway stations or bus stops, as in '~駅' (e.g. 'three stations away').
ここから東京駅までは電車で3駅です。
It's three stations by train from here to Tokyo Station.
次の駅で降りると、目的地まであと2駅ほど歩かなければならない。
If I get off at the next station, I'll have to walk about the equivalent of two more stations to reach my destination.