1. A garden on the roof of a building, especially one found in an urban setting.
2. The roof or top floor of a building designed for use by the public that often contains outdoor seating or dining facilities.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.