supermax

About 0.01 uses per million words.

Meaning

1. noun A prison with the highest possible level of security.
2. adjective Being, or pertaining to, such a prison.

Similar words

prisons supermaximum maximum security maximum supermaxim utmost maximal supermaxi superjail ultimate

Often followed by

prisons prison facilities facility confinement and units is in

Word family

Supermax Supermaxes supermaxes