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a vehicle such as a bus, train, or ship with two levels on top of one another, providing additional seating capacity
What is a "double-decker"?
A double-decker is a type of bus or coach that has two levels for passengers. The upper level offers an elevated view, while the lower level provides additional seating. Double-deckers are often used for public transportation in busy cities, tourist tours, and long-distance travel. They can carry more passengers than single-deckers, making them efficient for routes with high demand. The design allows for more space without needing a longer vehicle. Double-decker buses are popular in many cities around the world for their ability to transport a large number of people while taking up less road space.
a sandwich made with three slices of bread and two layers of filling
having two levels stacked on top of each other
