the.com/detention
Punishment by boredom, where freedom is confiscated and time is served in plastic chairs.
means A school disciplinary measure requiring a student to stay after hours, or the act of holding someone in custody.
from From Latin detentio, a holding back, via detinere — de (away) plus tenere (to hold), so literally to keep from leaving.
Legal sensePredates the school version by centuries.
Famous caseThe Breakfast Club ran on a single Saturday detention.
Physics stealParticle detectors borrowed the held-back logic of detention.