This is the 813th most frequent Hebrew word.
הקרובה
"The closest" or "the relative," depending on context.
The word 'הקרובה' here serves as an adjective describing 'event', implying it is the next or upcoming event in time.
אני אשתתף באירוע הקרובה בשבוע הבא.
I will attend the upcoming event next week.
The word 'הקרובה' functions as an adjective describing 'station', indicating it is the closest one in spatial terms.
התחנה הקרובה למקום מגוריך נמצאת במרחק של שני קילומטרים.
The nearest station to your residence is two kilometers away.
In this context, 'הקרובה' conveys the sense of geographical proximity, being an adjective describing 'city' as the nearest to the specified location.