Dictionary.com
Thesaurus.com

Category A

British  

adjective

  1. (of a prisoner) regarded as highly dangerous and therefore requiring constant observation and maximum security

  2. (of a prison or prison unit) designed for such prisoners

"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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

After that, he was moved to Frankland, a Category A high security jail.

From BBC

In 2008 Huntley was moved to HMP Frankland, a Category A high security men's prison.

From BBC

In the live-action category, a mixed bag of approaches — some inspired by classic literature — are burnished by inspired performances.

From Los Angeles Times

Poor Diane Warren has been nominated on the best original song category a whopping 17 times, but never won.

From BBC

Both “Sinners” and “One Battle After Another” were nominated in the academy’s new casting category, a first-year addition that helped push each film’s nomination total higher.

From Los Angeles Times