Search Dictionary
Definition of duplex

duplex

/ˈduː.plɛks/
du · plex

Plural:duplexes
•
Past Simple:duplexed
•
Past Participle:duplexed
•
Present Participle:duplexing
JUMP TO:

duplex Lexical Profile

duplex Game Scores & Validity

• noun

1

North American A residential building divided into two separate, self-contained living units, often side-by-side or on different floors.

Example

"They purchased a brick duplex in the suburbs so they could live in one unit and rent out the other."


2

A telecommunications or computing system that allows the transmission of data in two directions simultaneously.

Example

"The network architecture relies on a duplex to handle heavy streams of incoming and outgoing traffic without bottlenecks."


3

A double-stranded molecule of DNA or RNA.

Example

"The enzyme unwinds the DNA duplex to allow for genetic replication."

Synonyms
View all synonyms for duplex

• adjective

1

Capable of transmitting and receiving data simultaneously across a communication channel.

Example

"We need a duplex connection to ensure real-time audio and video synchronization during the broadcast."


2

Having two main parts or elements; twofold or double.

Example

"The machine features a duplex mechanism that allows it to operate twice as efficiently."

Synonyms
View all synonyms for duplex
Antonyms
View all antonyms for duplex

• verb

1

To print on both sides of a sheet of paper automatically.

Example

"The office software is configured to duplex all internal documents in order to save paper."


2

To form a double-stranded molecule from two single complementary strands (especially in genetics).

Example

"During the annealing phase of the experiment, the complementary RNA strands will duplex to form a stable structure."

Synonyms
View all synonyms for duplex
Antonyms
View all antonyms for duplex

Word Nuance & Usage

In telecommunications, 'duplex' implies simultaneous two-way communication (full-duplex), which is distinct from 'half-duplex' (two-way, but alternating directions) and 'simplex' (one-way only).

• Rhymes for duplex

Word Origin & Etymology

From Latin 'duplex', meaning 'twofold', derived from 'duo' (two) and 'plicare' (to fold).

Cite this Entry


Wordmom. (2026). Definition of Duplex. In Wordmom Dictionary. Retrieved Nov 6, 2026, from https://wordmom.com/dictionary/duplex
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Dictionary & Reference
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.