Solitary confinement is the housing of an adult or juvenile with minimal to rare meaningful contact with other individuals. Those in solitary confinement often experience sensory deprivation and are offered few or no educational, vocational, or rehabilitative programs. Different jurisdictions refer to solitary confinement by a variety of terms, such as isolation; administrative, protective, or disciplinary segregation; permanent lockdown; maximum security; supermax; security housing; special housing; intensive management; and restrictive housing units. Regardless of the term used, an individual who is deprived of meaningful contact with others is considered to be in solitary confinement.
https://www.ncchc.org/position-statements/solitary-confinement-isolation-2016/