a garden on a flat roof of a building
WordReference Random House Unabridged Dictionary of American English © 2026
roof′ gar′den,
- a garden on the flat roof of a house or other building.
- the top or top story of a building, having a garden, restaurant, or the like.
- 1890–95, American.
Collins Concise English Dictionary © HarperCollins Publishers::
'roof garden' also found in these entries (note: many are not synonyms or translations):