an apartment with rooms on two connected floors.
Words nearby duplex apartment
Origin of duplex apartment
An Americanism dating back to 1935–40
Also called duplex.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for duplex apartment
US and Canadian an apartment on two floors
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012