Solitary (Noun)

One who lives in solitude.

Nouns denoting people.

Confinement of a prisoner in isolation from other prisoners; "he was held in solitary".

Nouns denoting natural processes.

He spent six months in solitary after his attempted escape from the maximum-security prison.
The prison officials argued that solitary was necessary for his own safety due to his gang affiliations.
Life in solitary can drive even the strongest willed prisoners to madness and despair.
He lost track of time in solitary, unable to keep a mental or physical record of the days passing.
She endured over two years of solitary before finally being granted access to visitation rights and education programs.