- Definitions|0
- Thesaurus|45
- Abbreviations|0
2 entries under expression topic. ×
| penal institution(noun, pen, prison, lockup) | |
| up the river(noun, idiom, pen, prison) |
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| APA | Smart Define. (2013). secure unit thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/secure_unit/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "secure unit thesaurus" https://smartdefine.org/secure_unit/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2013, secure unit thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/secure_unit/thesaurus/synonyms>. |
| MLA | Smart Define. "secure unit thesaurus" 18 May 2013. Web. 20 September 2026. <https://smartdefine.org/secure_unit/thesaurus/synonyms> |