/ Dictionary / Index D duplex house: Meaning and Definition of Find definitions for: du'plex house' Pronunciation: [key] a house having separate apartments for two families, esp. a two-story house having a complete apartment on each floor and two separate entrances. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. duplexer duplex lock Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language