When someone, especially a child, behaves without any control or rules.
During the summer, the kids are allowed to run wild in the backyard.
여름 동안, 아이들은 뒷마당에서 마음껏 뛰어놀 수 있습니다.
When someone's thoughts or imagination are not controlled and become very active.
As I walked through the haunted house, my imagination began to run wild.
유령의 집을 지나가면서, 제 상상력이 마구잡이로 펼쳐지기 시작했습니다.