Detain

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1. Definition + Rich Everyday Explanation

Detain (verb) = to officially hold someone in custody and prevent them from leaving, typically by authorities such as police, immigration officials, or security personnel; to delay or keep someone from proceeding; to hold someone temporarily for questioning or administrative purposes.

“Detain” means to restrict someone’s freedom by keeping them in a particular place, usually for official or legal reasons. The word carries the sense of official authority — ordinary people don’t detain others; police officers, border guards, and security personnel detain people.

The most common usage involves law enforcement. When police detain someone, they’re holding that person, preventing them from leaving, often for questioning or investigation. Being detained is less severe than being arrested — you might be detained temporarily while police check your identity or investigate a situation, but detention doesn’t necessarily mean you’re being charged with a crime. However, during detention, you’re not free to go — that’s the crucial element.

In immigration contexts, authorities detain people whose legal status is uncertain — asylum seekers, visa overstayers, or undocumented migrants. These people are held in detention centers while their cases are processed or while awaiting deportation. This type of detention can last weeks, months, or even years, making it quite different from brief police detention.

There’s also a milder, everyday meaning: to delay or keep someone from doing something. “I won’t detain you” means “I won’t keep you any longer” or “I’ll let you go now.” “Sorry to detain you, but I have a quick question” means “Sorry to delay you.” This usage is more polite and formal, often appearing in business or professional contexts.

The word always implies that someone has power or authority to prevent another person from leaving or proceeding.

Examples from the street:

• “Police detained three suspects for questioning after the robbery” → officers held three people in custody to interrogate them about the crime
• “Border officials detained the travelers while verifying their documents” → immigration authorities kept the passengers waiting while checking their paperwork
• “I won’t detain you any longer — I know you’re busy” → I won’t keep you here or delay you further because you have other commitments

2. Most Common Patterns

• detain someone for + reason/purpose → hold someone in custody for a specific cause
• be detained by + authority → be held in custody by officials (passive)
• detain someone for questioning → hold someone to interrogate them
• briefly/temporarily detain → hold someone for a short period
• illegally/unlawfully detain → hold someone without proper legal authority
• detain someone pending + action → hold someone while waiting for something to happen
• won’t detain you → polite way of saying won’t keep you any longer

3. Idioms

Note: There are no common idioms directly containing “detain” — these are related expressions:

• hold someone up → delay or detain someone informally; less official than detain

  Example: “Sorry to hold you up, but could you sign this quickly?”

• keep someone → delay or detain someone politely; very common in casual speech

  Example: “I won’t keep you — I know you need to leave.”

4. Example Sentences

1. Airport security detained the passenger for additional screening

   → Transportation officials held the traveler temporarily for extra inspection procedures.

2. Police can detain someone for up to 24 hours without pressing charges

   → Law enforcement may hold a person in custody for one day before formally accusing them of crimes.

3. The journalist was detained by authorities while covering the protest

   → The reporter was held in custody by officials during their coverage of the demonstration.

4. Immigration officers detained several people pending verification of their visas

   → Border authorities held multiple individuals while waiting to confirm their legal permission to enter.

5. I apologize for detaining you, but this matter requires immediate attention

   → I’m sorry for keeping you here, but this issue needs urgent handling.

6. The suspect was briefly detained and then released without charges

   → The accused person was held in custody temporarily and subsequently freed without formal accusations.

7. Human rights groups condemned the government for unlawfully detaining protesters

   → Advocacy organizations criticized authorities for holding demonstrators in custody without proper legal justification.

8. Customs officials detained the shipment for inspection

   → Border personnel held the cargo temporarily for examination purposes.

9. The witness was detained for questioning about what she saw

   → The observer was held to be interrogated regarding her testimony.

10. I won’t detain you with unnecessary details — here’s the summary

    → I won’t delay you with excessive information — here’s the brief overview.

5. Personal Examples

1. After class, I sometimes detain students for a few minutes to discuss their progress

   → Following lessons, I occasionally keep learners briefly to talk about their development.

2. The school policy allows teachers to detain students after school only with advance notice to parents

   → The institutional rules permit instructors to keep pupils after hours only when families have been informed beforehand.

6. Register: Formal

✔ Native usage tips

• “Detain” is formal — in casual conversation, people say “hold someone,” “keep someone,” or “stop someone”
• “Detain for questioning” is a standard legal phrase everyone understands from news and crime shows
• “I won’t detain you” is polite and professional but sounds quite formal — more common in British English
• Being detained is less serious than being arrested, but you still cannot leave
• The noun form is “detention” — “held in detention” means the same as “detained”
• In news reports, “detained” is preferred over “arrested” when charges haven’t been filed yet

✔ Similar expressions / words

• Hold (someone) → more casual alternative; “police are holding three suspects” means the same as “detained”
• Arrest → more serious than detain; involves formal accusation of crime
• Delay / keep → informal alternatives for the non-legal meaning of preventing someone from leaving