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1. Definition + Rich Everyday Explanation
Detention (noun) = the punishment of being required to stay at school after normal hours as a disciplinary measure; the act of officially holding someone in custody, preventing them from leaving; or the state of being kept somewhere against your will by authority.
“Detention” is fundamentally about being held or confined by someone in authority. The word appears in two main contexts that share this core idea of restricted freedom.
In schools, detention is a common punishment where students must stay after class, during lunch, or after school for breaking rules. Students sit in a supervised room, often doing homework, writing lines, or simply sitting quietly. It’s designed to be boring and inconvenient — the loss of free time is the punishment. Teachers assign detention for various offenses: talking back, not completing homework, disrupting class, being late, or breaking school rules. Getting detention carries social stigma — it marks you as a troublemaker, at least temporarily.
In legal and political contexts, detention means being held in custody by authorities — police, immigration, or military. When someone is “in detention,” they’re being confined, usually in a jail, detention center, or holding facility. This can be temporary (police holding someone for questioning) or prolonged (immigration detention while awaiting deportation). The key element is that the person cannot leave — their freedom of movement has been taken away by official authority.
Both meanings share the idea of confinement and loss of freedom, though school detention is obviously much milder than legal detention. The word always implies someone in power is restricting someone else’s liberty as a form of control or punishment.
Examples from the street:
- “She got detention for being late three times this week” → the school punished her by making her stay after hours for repeated tardiness
- “He’s been held in detention awaiting his asylum hearing” → authorities are keeping him confined in a facility until his legal case is decided
- “The whole class got detention because nobody admitted who broke the window” → everyone was required to stay after school as collective punishment
2. Most Common Patterns
- get detention / be given detention → receive the punishment of staying after school
- serve detention / do detention → actually complete the punishment by staying
- in detention → currently being held or confined
- put someone in detention → assign the punishment or place someone in custody
- detention center/facility → place where people are held in legal custody
- after-school detention / lunchtime detention → specify when the school punishment occurs
- held in detention / kept in detention → being confined by authorities
3. Idioms
Note: There are no common idioms directly containing “detention” — these are related expressions:
- behind bars → in prison or detention; confined by legal authorities
Example: “The suspect remains behind bars pending trial.”
- do time → serve a period of detention or imprisonment
Example: “He did time for robbery when he was younger.”
4. Example Sentences
- Three students got detention for talking during the exam
→ Three pupils received the punishment of staying after school because they spoke while taking the test.
- The asylum seeker has been held in detention for six months awaiting a decision
→ The refugee applicant has been confined in a facility for half a year while authorities process their case.
- I have to serve detention tomorrow lunchtime for forgetting my homework
→ I must complete the punishment by staying during lunch break tomorrow because I didn’t bring my assignment.
- Immigration authorities put him in detention after his visa expired
→ Border officials confined him in a holding facility when his permission to stay ran out.
- The whole football team got after-school detention for breaking the equipment
→ All the players received punishment requiring them to stay late because they damaged school property.
- Human rights groups criticized conditions at the detention center
→ Advocacy organizations condemned the living standards in the facility where people are held in custody.
- She’s in detention right now, so she’ll be late meeting us
→ She’s currently serving her school punishment, so she won’t arrive on time for our gathering.
- Police can only hold suspects in detention for 24 hours without charging them
→ Law enforcement may only keep arrested people confined for one day before formally accusing them of crimes.
- He managed to avoid detention by apologizing sincerely to the teacher
→ He escaped the punishment of staying after school by offering a genuine apology to the instructor.
- The government announced plans to close several immigration detention facilities
→ Authorities declared intentions to shut down multiple centers where migrants are held in custody.
5. Personal Examples
- When I first started teaching, I rarely gave detention because I preferred talking through problems with students
→ When I began my career, I seldom assigned the punishment of staying after school because I favored discussing issues with learners instead.
- Students who consistently forget materials have to serve lunchtime detention in my classroom
→ Pupils who repeatedly don’t bring supplies must complete punishment during their break period in my room.
6. Register: Neutral
✔ Native usage tips
- “Detention” in school contexts is universal in British and American English — everyone understands it immediately
- “Get detention” is more common than “receive detention” in casual speech
- “Serve detention” emphasizes actually completing the punishment, like “serving time” in prison
- In legal contexts, “detention” is formal — news reports use “held in custody” or “detained” interchangeably
- “Detention center” specifically refers to immigration or youth facilities, not regular prisons
✔ Similar expressions / words
- Custody → legal term for being held by authorities; more formal than detention
- Confinement → being restricted to a place; broader term that includes detention
- Lines → British school punishment of writing sentences repeatedly; alternative to detention
