adj · noun · verb · 19 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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General-American:do͞o'plĕks
General-American:/ˈdu.plɛks/
Southern-England:Recorded audio is listed in the source snapshot.
rhymes with -uːplɛks
CMU ARPABET:D UW1 P L EH2 K S
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Double; made up of two parts.
Having two floors.
Definition source: English Wiktionary via Wiktextract
Usage: not-comparable
Topics: architecture
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
adj
Meaning 2
Double; made up of two parts.
Having two units, divisions, suites, or apartments.
Definition source: English Wiktionary via Wiktextract
Usage: not-comparable
Topics: architecture
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
adj
Meaning 3
Double; made up of two parts.
Of stainless steel: having a structure containing austenite and ferrite in roughly equal proportions.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
15
adjective satellite
Meaning 15
allowing communication in opposite directions simultaneously
Definition source: Princeton WordNet 3.0
Examples
duplex system
duplex telephony
Meaning relationships
Synonyms: none provided
Antonyms: none provided
16
adjective satellite
Meaning 16
(used technically of a device or process) having two parts
Definition source: Princeton WordNet 3.0
Examples
a duplex transaction
Meaning relationships
Synonyms: none provided
Antonyms: none provided
17
noun
Meaning 17
an apartment having rooms on two floors that are connected by a staircase
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: duplex apartment
Antonyms: none provided
Broader terms: apartment, flat
18
noun
Meaning 18
a house with two units sharing a common wall
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: duplex house, semidetached house
Antonyms: none provided
Broader terms: house
19
verb
Meaning 19
change into a duplex
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: convert
History
Etymology
PIE word *dwóh1 Borrowed from Latin duplex (“double, two-fold”), from duo (“two”) + plico (“fold together”); compare the roots of διπλόος (diplóos, “double”); compare also πλέκω (plékō, “twist, braid”). By surface analysis, duo- + -plex.
Across languages
Translations
38 source translations are retained for this English entry.
Bulgarian:
двоен
(dvoen)
— made up of two parts
Bulgarian:
сдвоен
(sdvoen)
— made up of two parts
Chinese Mandarin:
雙重的 /双重的
— made up of two parts
Esperanto:
dupleksa
— made up of two parts
Finnish:
kaksiosainen
— made up of two parts
Greek:
διπλός
(diplós)
— made up of two parts
Greek:
διμερής
(dimerís)
— made up of two parts
Finnish:
kaksikerroksinen
— architecture: having two floors
Finnish:
pari-
— architecture: having two units, divisions, suites, or apartments
Finnish:
duplex-
— metallurgy: of stainless steel, containing austenite and ferrite in roughly equal proportions
Bulgarian:
двупосочен
(dvuposočen)
— telecommunication: in two directions
Chinese Mandarin:
雙向的 /双向的
— telecommunication: in two directions
Chinese Mandarin:
雙工 /双工
(shuānggōng)
— telecommunication: in two directions
Finnish:
kaksisuuntainen
— telecommunication: in two directions
Finnish:
dupleksi
— telecommunication: in two directions
Greek:
αμφίδρομος
(amfídromos)
— telecommunication: in two directions
Scottish Gaelic:
dà-shlighe
— telecommunication: in two directions
Spanish:
dúplex
— telecommunication: in two directions
Vietnamese:
song công
— telecommunication: in two directions