roof-deck

[ roof-dek, roo f- ]
/ ˈrufˌdɛk, ˈrʊf- /

noun

a part of a flat roof used for gardening, sunbathing, etc.

Origin of roof-deck

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019