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Meaning of DUPLEX

Pronunciation:  'doopleks

WordNet Dictionary
  1. [n]  an apartment having rooms on two floors that are connected by a staircase
  2. [n]  a house with two units sharing a common wall
  3. [adj]  (telecommunication) allowing communication in opposite directions simultaneously; "duplex system"; "duplex telephony"
  4. [adj]  (used technically of a device or process) having two parts; "a duplex transaction"

DUPLEX is a 6 letter word that starts with D.


 Synonyms: bidirectional, duplex apartment, duplex house, multiple, semidetached house
 See Also: apartment, flat, house



Webster's 1913 Dictionary
  1. \Du"plex\, a. [L., fr. duo two + plicare to fold. See
    {Two}, and {Complex}.]
    Double; twofold.
    {Duplex escapement}, a peculiar kind of watch escapement, in
       which the scape-wheel has two sets of teeth. See
    {Duplex lathe}, one for turning off, screwing, and surfacing,
       by means of two cutting tools, on opposite sides of the
       piece operated upon.
    {Duplex pumping engine}, a steam pump in which two steam
       cylinders are placed side by side, one operating the
       valves of the other.
    {Duplex querela} [L., double complaint] (Eccl. Law), a
       complaint in the nature of an appeal from the ordinary to
       his immediate superior, as from a bishop to an archbishop.
       --Mozley & W.
    {Duplex telegraphy}, a system of telegraphy for sending two
       messages over the same wire simultaneously.
    {Duplex watch}, one with a duplex escapement.
  2. \Du"plex\, v. t. [See {Duplex}, a.] (Teleg.)
    To arrange, as a telegraph line, so that two messages may be
    transmitted simultaneously; to equip with a duplex
    telegraphic outfit.
Computing Dictionary

Used to describe a communications channel that can carry signals in both directions, in contrast to a simplex channel which only ever carries a signal in one direction.

If signals can only flow in one direction at a time the communications is "half-duplex", like a single-lane road with traffic lights at each end. Walkie-talkies with a "press-to-talk" button provide half-duplex communications.

If signals can flow in both directions simultaneously the communications is "full-duplex", like a normal two-lane road. Telephones provide full-duplex communications.

The term "duplex" was first used in wireless, telegraph, and telephone communications. Nearly all communications circuits used by computers are two-way, so the term is seldom used.


Thesaurus Terms
 Related Terms: 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, Janus-like, matched, second, secondary, tenement, twain, twin, twinned, two, two-faced, twofold, two-level, two-ply, two-sided, two-story