From Wiktionary, the free dictionary
From deck + top.
decktop (plural decktops)
- The top of a deck (on a ship etc.).
2007 June 19, Charles V. Bagli, “A Co-op on Sutton Place Sues to Keep Its Backyard”, in New York Times[1]:The city leased the decktop to the co-op for $1 a year.
