of, relating to, or suggesting a jail or prison
Late Latin, from Latin carcer prison (http://www.merriam-webster.com/dictionary/carceral)
"In Caught: The Prison State and the Lockdown of American Politics, Marie Gottschalk traces the explosive growth of the U.S. prison population over the last four decades. She also broadens the focus beyond incarceration to what she calls 'a tenacious carceral state' that reaches far beyond the prison gate and creates a permanent class of outcasts—the millions on parole or probation, and the millions more who, as a result of criminal conviction, cannot vote, work in certain occupations, or even live in their own homes."
- David Fathi, Winter 2016 Stand (https://www.aclu.org)