Deck

1. The floorlike covering of the horizontal sections, or compartments, of a ship. Small vessels have only one deck; larger ships have two or three decks.
2. (arch.) The upper part or top of a mansard roof or curb roof when made nearly flat.
3. (Railroad) The roof of a passenger car.
4. A pack or set of playing cards.
5. A heap or store.
6. (Aëronautics) A main aëroplane surface, esp. of a biplane or multiplane.
7. the portion of a bridge which serves as the roadway.
8. a flat platform adjacent to a house, usually without a roof; -- it is typically used for relaxing out of doors, outdoor cooking, or entertaining guests.
Berth deck (Navy),
a deck next below the gun deck, where the hammocks of the crew are swung.
Boiler deck (River Steamers),
the deck on which the boilers are placed.
Flush deck ,
any continuous, unbroken deck from stem to stern.
Gun deck (Navy),
a deck below the spar deck, on which the ship's guns are carried. If there are two gun decks, the upper one is called the main deck, the lower, the lower gun deck; if there are three, one is called the middle gun deck.
Half-deck ,
that portion of the deck next below the spar deck which is between the mainmast and the cabin.
Hurricane deck (River Steamers, etc.),
the upper deck, usually a light deck, erected above the frame of the hull.
Orlop deck ,
the deck or part of a deck where the cables are stowed, usually below the water line.
Poop deck ,
the deck forming the roof of a poop or poop cabin, built on the upper deck and extending from the mizzenmast aft.
Quarter-deck ,
the part of the upper deck abaft the mainmast, including the poop deck when there is one.
Spar deck
1. Same as the upper deck.
2. Sometimes a light deck fitted over the upper deck.
Upper deck ,
the highest deck of the hull, extending from stem to stern.