1. a large room containing many beds, especially in a school or institution
2. a building at a college or university where students live
Usage: often shortened to ‘dorm’

Examples

• The boarding school dormitory housed twenty students.
• She lived in a dormitory during her freshman year of college.
• The old dormitory was converted into apartments.
• Each dormitory room was shared by two roommates.
• The university built a new dormitory to accommodate more students.
• Lights out in the dormitory was at 10 PM.
• The dormitory had a common room where students could study together.