# GNU

/ˈnu/ (US) · /ɡənˈuː/ (UK) · CEFR C2 · Noun

Source: https://englishreference.com/word/gnu
Updated: 2026-10-01

## Definition

Stands for GNU's Not Unix. A large collection of free software that allows people to use and change computer programs without paying or asking for permission.

For teachers: Abbreviation for GNU's Not Unix. An extensive collection of free software, which, when combined with the Linux kernel, forms a complete operating system based on the principles of user freedom and open collaboration.

## Examples

- Many developers prefer using GNU tools for their projects.
- The philosophical foundation of the GNU project is rooted in the belief that software users should have the liberty to share, study, and modify the source code they rely upon.

## Usage notes

- Usually functions as a proper noun referring to the software project or as a modifier for related terms like 'GNU license'.

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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.