Something, such as a vehicle, structure, or sandwich, that has two decks, floors, or layers.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "double-decker" in a sentence
"But the so-called "double-decker" fund expose retail investors to high-yield, risky emerging markets."
"In the next forty minutes Tomas found heaven: a house with double-decker porches overlooking the river, an old bridge across Wist Creek, an abandoned mill."
"The ICC also employs Hong Kong's first double-decker elevators, which can serve two floors at the same time, reducing the need for extra shafts."