Source : Webster's Revised Unabridged Dictionary (1913)

Refectory \Re*fec"to*ry\ (-t?*r?), n.; pl.; {Refectories}
   (-r?z). [{LL}. refectorium: cf. F. r['e]fectoire. See
   {Refection}.]
   A room for refreshment; originally, a dining hall in
   monasteries or convents.

   Note: Sometimes pronounced r?f"?k*t?*r?, especially when
         signifying the eating room in monasteries.

Source : WordNet®

refectory
     n : a communal dining-hall (usually in a monastery)