# WebSocket

CEFR C2 · Noun

Source: https://englishreference.com/word/websocket
Updated: 2026-08-15

## Definition

a technology that allows a computer and a server to talk to each other constantly without stopping. It is used for things that need to update instantly, like a chat app or a live game.

For teachers: a communications protocol providing full-duplex communication channels over a single TCP connection. It enables real-time data transfer between a client and a server with lower overhead than traditional HTTP polling.

## Examples

- The chat app uses a WebSocket to show messages instantly.
- By implementing a WebSocket, the developers ensured that the stock prices on the dashboard updated in real time without the user needing to refresh the page.
- Unlike standard HTTP requests which are unidirectional and short-lived, a WebSocket maintains an open connection, allowing the server to push updates to the client as soon as events occur.

## Usage notes

- Often used in the singular when referring to the protocol or in the plural when discussing multiple active connections.

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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.