English Reference

Word

prison

US/ˈpɹɪzən/

UK/pɹˈɪzən/

Definitions

01the building

A2 · Elementary Countable noun Law

n. a building where people are kept as a punishment for a crime they committed.

n. a physical institution or facility designed for the involuntary confinement of individuals, typically as a legal penalty for criminal activity.

“The thief was caught by the police and sent to prison for three years.”

“The government announced plans to modernise the Victorian-era prison, citing concerns over overcrowding and the lack of rehabilitation facilities for long-term inmates.”

02the state of being locked up

B1 · Intermediate Uncountable noun Law

n. the time someone spends locked away as a punishment.

n. the state or condition of being incarcerated; often used without an article in prepositional phrases.

“He spent most of his adult life in prison for various small crimes.”

“The legal team argued that their client had already spent enough time in prison awaiting trial to justify an immediate release on parole.”

Usage

Used without 'the' when referring to the institution's purpose (e.g., 'he is in prison'), but with 'the' when referring to the specific building.

Antonyms

03a restrictive place

B2 · Upper Intermediate Countable noun Informal

n. a place or situation that makes you feel trapped or unhappy because you have no freedom.

n. a metaphorical or figurative use describing any environment or circumstance that feels excessively restrictive or oppressive.

“Without any friends or hobbies, the small town felt like a prison to her.”

“To the creative spirit of the young artist, the rigid hierarchy and repetitive tasks of the corporate office became a psychological prison.”

Synonyms

04to lock someone up

C1 · Advanced Literary

v. to put someone in a place they cannot leave.

v. to confine or shut up in or as if in a prison. This form is less common than the derived verb 'imprison'.

“The king decided to prison his enemies in the dark tower.”

“The poem describes how grief can prison a man's soul more effectively than any iron bars or stone walls.”

Usage

Takes a direct object.

Teaching tip

In modern daily English, 'imprison' is much more common as a verb than 'prison'.

Antonyms

Etymology

From Middle English prisoun, prison, from Old English prisūn, a borrowing from Old French prison, from Latin prehensiōnem, accusative singular of prehensiō, from the verb prehendō. Doublet of prehension.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

NOUN

prison(A2)

Related words

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A2 KeyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.3.0–4.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 2.0–2.524–43TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.225–549
Frequency
Very common
Level
A2 · ElementaryOxford
Updated

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