# simplex

/ˈsɪmˌpɫɛks/ (US) · /sˈɪmplɛks/ (UK) · CEFR C2 · Adjective

Source: https://englishreference.com/word/simplex
Updated: 2026-05-18

## Definition

having only one part or being very simple. In computing, it describes a system where data moves in only one direction at a time.

For teachers: consisting of a single part or element; in computing, referring to a communication system where data flows in only one direction at a time.

## Examples

- The simplex mode is used for basic radio communication.
- In a simplex communication system, only one device can transmit data at a time, unlike a duplex system.
- The simplex algorithm is a method for solving linear programming problems by moving from one vertex of the feasible region to another in search of an optimal solution.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.