This is the 863rd most frequent Japanese word.
近い
Close; near.
近い is used as a plain adjective to describe proximity to the station.
駅が近いです。
The station is close.
近い describes the similarity or closeness of ages between two subjects.
彼は年齢が私に近いです。
His age is close to mine.
近い refers to a metaphorical proximity in time, implying that an event is likely to happen soon.