Deck  —n. 1 a platform in a ship serving as a floor. B the accommodation on a particular deck of a ship. 2 floor or compartment of a bus etc. 3 section for playing discs or tapes etc. In a sound system. 4 esp. Us pack of cards. 5 slang ground. —v. 1 (often foll. By out) decorate. 2 provide with or cover as a deck.  below deck(s) in or into the space below the main deck. [dutch, = cover]