Source : Webster's Revised Unabridged Dictionary (1913)

Dormitory \Dor"mi*to*ry\, n.; pl. {Dormitories}. [L.
   dormitorium, fr. dormitorius of or for sleeping, fr. dormire
   to sleep. See {Dormant}.]
   1. A sleeping room, or a building containing a series of
      sleeping rooms; a sleeping apartment capable of containing
      many beds; esp., one connected with a college or boarding
      school. --Thackeray.

   2. A burial place. [Obs.] --Ayliffe.

            My sister was interred in a very honorable manner in
            our dormitory, joining to the parish church.
                                                  --Evelyn.

Source : WordNet®

dormitory
     n 1: a college or university building containing living quarters
          for students [syn: {dorm}, {residence hall}, {hall}, {student
          residence}]
     2: a large sleeping room containing several beds [syn: {dormitory
        room}, {dorm room}]