copyleft.
The philosophy of using copyrights to enforce freedom of information, especially software source code.
Meaning & usage
The philosophy of using copyrights to enforce freedom of information, especially software source code.
They believe in copyleft because they want their software to be used freely by anyone.
A software license that follows this philosophy.
I have placed my program under copyleft.
The GNU General Public License is a copyleft licence.
Where this word comes from
A pun on copyright, which refers to using copyright laws for purposes that are in some ways contrary to copyright's original intent.
To license under a copyleft license.
Linus Torvalds copylefted the Linux kernel.
Where this word comes from
A pun on copyright, which refers to using copyright laws for purposes that are in some ways contrary to copyright's original intent.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.