Definition of "triplex" [tri•plex]

• Composed of three parts; threefold; triple. (adjective)
• Having three apartments, divisions, or floors: a triplex apartment building; a triplex cinema. (adjective)
• Something, such as an apartment building, that is triplex: We live in a triplex. (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.

• "Now a new triplex is being constructed just across the street by West Hill Homes."
• "Also like The Hours, which reworked Virginia Woolf, this narrative triplex is built on a bookish foundation: the poetry and ontology of Walt Whitman."
• "But the pace of these sales—including a triplex loft on Prince Street that went for $25 million, and a three-bedroom apartment at 15 Central Park West that sold for $24.5 million—have been increasing, creating a sense of excitement in the market."