abovedeck adjective 1adverb 1noun 1forms 2 adjective1 •Located on deck.These heating elements allow the gun mount to continue to operate when the abovedeck temperature is as low as 40° C. — 1997 adverb1 •On deck.Dress warmly so that you can stay abovedeck in the fresh air. — 1983 noun1 •The area on a boat that is abovedeck.It's a good idea to plan these jobs in logical steps, working down from abovedeck to the bilge. — 1978 formsmore abovedeck · most abovedeck