Your link to reclusion lists the following definitions:
re•clu•sion (rɪˈklu ʒən)
n
The condition of being a recluse.
Punishment involving civil degradation (as in the loss of the right to own property) and incarceration with hard labor.
the act of going or putting into seclusion or the state of being secluded or solitary.
the state of living apart from society, like a hermit. — recluse, n. — reclusive, adj.
My highlighted parts of the definition, as well as Josh61's first two block quotes would point to a voluntary reclusion being a strong possibility currently as well as historically.
The "2" definition above speaks to loss of civil rights and incarceration (with hard labor) not specifically to solitary confinement.
The definition provided by both Josh61 and User3306356 mention solitary confinement but is is a narrowing (in a sense reculsion from reclusion) of the broader definition which is incarceration as a punishment. In some locations the loss of civil rights survives incarceration - loss of voting privileges in some US states for example.