an apartment with rooms on two connected floors.
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Please, Adverb, Tell Us WhenThe most common types of adverbs are those of frequency, manner, place, purpose, and time. They describe when, how, where, and why an action occurs. Adverbs are sometimes used to intensify an action, or they may describe the circumstances in which an action takes place. Adverbs usually modify verbs. They can also describe adjectives and other adverbs. Adverbs tend to end with the suffix -ly, …
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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
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