Standard Lemma guide

copyleft

noun · verb · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

The philosophy of using copyrights to enforce freedom of information, especially software source code.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Examples

  • They believe in copyleft because they want their software to be used freely by anyone.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A software license that follows this philosophy.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Examples

  • I have placed my program under copyleft.
  • The GNU General Public License is a copyleft licence.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

verb

Meaning 3

To license under a copyleft license.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Examples

  • Linus Torvalds copylefted the Linux kernel.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

A pun on copyright, which refers to using copyright laws for purposes that are in some ways contrary to copyright's original intent.

Across languages

Translations

9 source translations are retained for this English entry.

  • Basque: copyleft — philosophy
  • French: gauche d'auteur — philosophy
  • French: copyleft — philosophy
  • German: Copyleft — philosophy
  • Indonesian: hak tiru — philosophy
  • Russian: копилефт (kopileft) — philosophy
  • Russian: авторское ле́во (avtorskoje lévo) — philosophy
  • Spanish: copyleft — philosophy
  • Vietnamese: bản quyền ngược — philosophy