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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.

But he said the user who uploaded it had then used a different AI tool, not made by xAI, to create a Category A image - the most serious category.

From BBC • Jan. 7, 2026

Two were of Category A, the most serious.

From BBC • Feb. 16, 2024

China downgraded the management of COVID-19 to Category B from Category A at the end of 2022 after almost three years of strict restrictions that included locking down entire cities.

From Reuters • Sep. 15, 2023

China puts infectious diseases into three classes, with the top level Category A giving authorities the power to quarantine patients and their close contacts.

From Reuters • Sep. 15, 2023

Mr Mitchell estimated that it would cost £20m to bring the Category A Listed building back to life as a museum.

From BBC • Mar. 22, 2023