---

title: Global variable

slug: Glossary/Global_variable

page-type: glossary-definition

---

{{GlossarySidebar}}

A global variable is a {{glossary("variable")}} that is declared in the {{glossary("global scope")}} in other words, a variable that is visible from all other scopes.

In JavaScript it is a {{glossary("property")}} of the {{glossary("global object")}}.

## See also

- [Global variable](https://en.wikipedia.org/wiki/Global_variable) on Wikipedia