Copyleft definition

kŏpē-lĕft
A form of licensing that encourages the distribution of software at no charge for noncommercial uses.
noun
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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.

noun
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A software license that follows this philosophy.

I have placed my program under copyleft.

The GNU General Public License is a copyleft licence.

noun
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To license under a copyleft license.

Linus Torvalds copylefted the Linux kernel.

verb
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Other Word Forms

Noun

Singular:
copyleft
Plural:
copylefts

Origin of copyleft

  • After copyright

    From American Heritage Dictionary of the English Language, 5th Edition

  • Pun on copyright.

    From Wiktionary