This is the 5416th most frequent Korean word.
뛰던
"뛰던" means "was running" or "used to run."
Here, '뛰던' describes someone who used to run, providing background information about the individual's past habit.
그는 항상 공원에서 뛰던 사람이에요.
He is someone who always ran in the park.
In this sentence, '뛰던' is used to indicate the place related to the speaker's past action of running.
여기가 내가 매일 뛰던 길이에요.
This is the path where I used to run every day.
Here, '뛰던' reflects a specific past action related to the dream's imagery.