A shoe rack or cupboard placed at an entrance for storing shoes (including geta); commonly found in schools, homes, and facilities.
学校に着いたらまず下駄箱に靴を入れてください。
When you arrive at school, please put your shoes in the shoe locker first.
玄関の下駄箱がいっぱいで、新しい靴をどこに置くか困っている。
The shoe rack at the entrance is full, and I'm not sure where to put the new shoes.
飲食店の入口に下駄箱と鍵が用意されていることがある。
Some restaurants provide shoe lockers with keys at the entrance.