duplex

adjective
du·​plex | \ ˈdü-ˌpleks How to pronounce duplex (audio) also ˈdyü-\

Definition of duplex

 (Entry 1 of 3)

1a : having two principal elements or parts : double, twofold
b : having two complementary polynucleotide strands of DNA or of DNA and RNA
2 : allowing telecommunication in opposite directions simultaneously

duplex

verb
duplexed; duplexing; duplexes

Definition of duplex (Entry 2 of 3)

transitive verb

: to make duplex

duplex

noun

Definition of duplex (Entry 3 of 3)

: something duplex: such as
a : a 2-family house
c : a duplex molecule of DNA or of RNA and DNA

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Synonyms & Antonyms for duplex

Synonyms: Adjective

binary, bipartite, double, double-barreled, double-edged, dual, twin, twofold

Antonyms: Adjective

single

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Did You Know?

Duplex can describe a confusing variety of things, depending on the technical field. Most of us use it as a noun: a duplex can be either a two-family house or a two-story apartment. In computer science and telecommunications, duplex (or full-duplex) communication can go in both directions at once, while half-duplex communication can go only one way at a time. In other areas, just translate duplex as "double" and see if the sentence makes sense.

Examples of duplex in a Sentence

Adjective

a duplex apartment with all of the bedrooms on the second floor

Noun

We live in the brick duplex.

Recent Examples on the Web: Noun

Officers arrived and found a woman dead in the duplex, police said. Evan Macdonald, cleveland.com, "Man arrested after car stolen from Cleveland home where woman found dead, records say," 16 Aug. 2019 Prosecutors say Cook prepared a bedroom in the duplex for Staton’s beating by covering the floor and walls with painter’s plastic. Madeline Mcgee, Anchorage Daily News, "Man accused of preparing room where gang member would be beaten pleads guilty to kidnapping," 8 Aug. 2019 Blessy Briscoe, who spoke during the public-comment period of the meeting , asked whether or not one of two units in a duplex owned by the same person could be rented out. Lila Seidman, Glendale News-Press, "Glendale could implement Airbnb rules this fall," 23 July 2019 Our duplex, at 5424½ Harold Way, was demolished long ago. Héctor Tobar, The New Yorker, "The Assassin Next Door," 22 July 2019 The home is a duplex and the couple lived in the lower level. Sarah Horner, Twin Cities, "Man stabbed by resident after allegedly breaking into St. Paul home is charged with burglary, assault," 9 Aug. 2019 Beth Leytham, a spokeswoman for the Orlando Housing Authority, said Unit A of the duplex has been in the Section 8 program since 2016 and Unit B since 2017. Caroline Glenn, orlandosentinel.com, "Amid affordable housing crisis, Orange County may eliminate duplex for low-wage families," 25 July 2019 Burglary: Cedar Road At 11:10 p.m. July 2, a resident of a duplex called police to state that the door to the home of the person living below, who was not at home, was ajar. cleveland.com, "Woman cited for two thefts in one hour: University Heights Police Blotter," 10 July 2019 There was no structural damage to either part of the duplex and the fire was contained to the living room area in the lower unit. Keith Schubert, Milwaukee Journal Sentinel, "86-year-old man dead, his 62-year-old daughter injured in Cedarburg house fire Friday," 5 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'duplex.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of duplex

Adjective

1567, in the meaning defined at sense 1a

Verb

1833, in the meaning defined above

Noun

1922, in the meaning defined above

History and Etymology for duplex

Adjective

Latin, from duo two + -plex -fold — more at two, -fold

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More Definitions for duplex

duplex

noun

English Language Learners Definition of duplex

US
: a building that is divided into two separate homes
: an apartment with two floors

duplex

noun
du·​plex | \ ˈdü-ˌpleks How to pronounce duplex (audio) , ˈdyü-\

Kids Definition of duplex

: a house with two separate living spaces

duplex

noun
du·​plex | \ ˈd(y)ü-ˌpleks How to pronounce duplex (audio) \

Medical Definition of duplex

: a molecule having two complementary polynucleotide strands of DNA or of DNA and RNA