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supermax

British  
/ ˈsuːpəˌmæks /

noun

  1. having or relating to the very highest levels of security

    a supermax jail

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Perez’s only request to the court was that Zambada be spared the fate of El Chapo, who is serving out his life sentence under strict isolation at a federal supermax prison in Colorado.

From Los Angeles Times Jul. 20, 2026

The 47-year-old lawyer promised to build supermax prisons in the Amazon while reinforcing the army to smash trafficking groups.

From The Wall Street Journal Jun. 1, 2026

He said Akram was doing "as well as can be expected" while in custody in Goulburn supermax prison.

From BBC Feb. 16, 2026

The 68-year-old "El Chapo" is serving a life sentence at a supermax federal prison in Colorado following his 2016 arrest and 2019 conviction.

From Barron's Nov. 28, 2025

A supermax is like a huge SHU, with 100 percent segregation cells.

From "Newjack: Guarding Sing Sing" by Ted Conover

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