refectory
Concise Oxford English Dictionary © 2008 Oxford University Press:
refectory/rɪˈfektri/
▶noun (pl. refectories) a room used for communal meals, especially in an educational or religious institution.
– origin ME: from late L. refectorium, from L. reficere ‘refresh, renew’.
'refectory' also found in these Oxford entries:

