AskDefine | Define duplex

Dictionary Definition

duplex adj
1 (used technically of a device or process) having two parts; "a duplex transaction"
2 allowing communication in opposite directions simultaneously; "duplex system"; "duplex telephony"


1 a house with two units sharing a common wall [syn: duplex house, semidetached house]
2 an apartment having rooms on two floors that are connected by a staircase [syn: duplex apartment]

User Contributed Dictionary



From duplex, from duo + plico from πλέκω.


  1. double, made up of two parts
  2. two direction (electronical signaling)



  1. house made up of two dwelling units
  2. (stamp-collecting) a cancellation combining a numerical cancellation with a second mark showing time, date, and place of posting.

Extensive Definition

Duplex, meaning double or twofold, commonly refers to:
Duplex can also refer to:

Arts and music



  • Duplex printing, the ability of a computer printer to print on both sides of a page
  • Duplex lamp, a type of oil lamp invented by Joseph Hinks
  • Duplex worm gear system, a specification to adjust backlash in worm drives
  • Duplex grade steel
  • RAID1 mirroring with independent disk controllers for each disk


  • Duplex can refer to a double stranded molecule of DNA or RNA
  • Duplex reticle, a type of telescopic sight with a type of crosshairs reticle tapering to the center of the scope's sight picture
  • Duplex bullets, a small-arms cartridge with two bullets in it
  • Duplex nails, a 2 headed nail mainly used for setting up foundations
duplex in Czech: Duplex
duplex in German: Duplex
duplex in Spanish: Dúplex
duplex in French: Duplex
duplex in Korean: 듀플렉스

Synonyms, Antonyms and Related Words

Janus-like, ambidextrous, apartment house, bifacial, bifold, biform, bifurcated, bilateral, binary, binate, biparous, bipartisan, bipartite, bivalent, condominium, conduplicate, cooperative apartment house, dichotomous, disomatous, double, double-barreled, double-faced, duadic, dual, dualistic, duple, duplex house, duplicate, duplicated, dyadic, flats, geminate, geminated, high-rise apartment building, identical, matched, second, secondary, tenement, twain, twin, twinned, two, two-faced, two-level, two-ply, two-sided, two-story, twofold
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