# Realm

A JavaScript execution environment with its own global object and built-in objects.

## What is **Realm** in JavaScript?

**Realm** — A JavaScript execution environment with its own global object and built-in objects.

Level: Master · [More JavaScript terms at this level](https://www.ask-codey.com/glossary/subjects/javascript/master)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/realm