Webster's Revised Unabridged Dictionary · 1913

Inmate

Inmate (in"māt`) , noun

[In + mate an associate.]

One who lives in the same house or apartment with another; a fellow lodger;
one of the occupants of an asylum, hospital, or prison;
one who occupies or lodges in any place or dwelling.
So spake the enemy of mankind, inclos'd In serpent, inmate bad. — Milton

Inmate , adjective

Admitted as a dweller; resident; internal. [Rare]
Inmate guests. — Milton