Source : Webster's Revised Unabridged Dictionary (1913)

Infirmary \In*firm"a*ry\ ([i^]n*f[~e]rm"[.a]*r[y^]), n.; pl.
   {Infirmaries} (-r[i^]z). [Cf. OE. fermerie, OF. enfermerie,
   F. infirmerie, LL. infirmaria. See {Infirm}.]
   A hospital, or place where the infirm or sick are lodged and
   nursed gratuitously, or where out-patients are treated.

Source : WordNet®

infirmary
     n : a health facility where patients receive treatment [syn: {hospital}]