Source : Webster's Revised Unabridged Dictionary (1913)

Orphanage \Or"phan*age\, n.
   1. The state of being an orphan; orphanhood; orphans,
      collectively.

   2. An institution or asylum for the care of orphans.

Source : WordNet®

orphanage
     n 1: the condition of being a child without living parents; "his
          early orphanage shaped his character as an adult" [syn:
          {orphanhood}]
     2: a public institution for the care of orphans [syn: {orphans'
        asylum}]