dining-hall

from WordNet (r) 3.0 (2006)

dining-hall
    n 1: a large room at a college or university; used especially
         for dining

from The Collaborative International Dictionary of English v.0.48

dininghall \dininghall\, dining-hall \dining-hall\, dining hall
\dining hall\n.
   a large room at a college or university, used especially for
   dining.
   [WordNet 1.5] diningroom