/dub"euhl dek"euhr/ , n.
1. something with two decks, tiers, or the like, as two beds one above the other, a ship with two decks above the water line, or a bus with two decks.
2. a food item consisting of two main layers, as a sandwich made with three slices of bread and two layers of filling.
[ 1825-35, Amer. ]