The Collaborative International Dictionary of English v.0.48:

Refectory \Re*fec"to*ry\ (-[-o]*r[y^]), 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.
   [1913 Webster]

   Note: Sometimes pronounced r[e^]f"[e^]k*t[-o]*r[y^],
         especially when signifying the eating room in
         monasteries.
         [1913 Webster]

WordNet (r) 3.0 (2006):

refectory
    n 1: a communal dining-hall (usually in a monastery)