A special room in high school, where you go if you do something very severe,
2. Get caught cheating
3. Bad-mouthing a teacher
4. Get caught leaving the school grounds before school is over
5. Fighting with a fellow student or faculty.
The student who was in violation has to collect all their assignments from their assigned teachers, and they are not allowed to go to the cafeteria for their lunch break, lunch is to be eaten in the detention room.
I was put in detention for giving my study hall teacher the one finger-salute for being a smart-ass. That was the only time I was put in detention