The Meaning Of Copyleft

Copyleft is a play on word of copyright. Copyleft is the using copyright laws to remove restrictions from the sharing of copies, modified adaptations of a work for others, yet requires the same rights be preserved in the modified adaptations.

Copyleft is often applied by a license that defines precise copyright terms, which are applied to software, documents, music, and art. While copyright laws by design, restrict the right to produce and redistribute copies of an author's original work.
The copyleft license uses copyright laws to guarantee that each individual who receives a copy of the work has the right to study, use, modify, and redistribute the original work as well as any consequential versions providing that the same licensed terms
apply to all redistributed versions of the work. Therefore, copyleft is the exact opposite of copyright.

In legal terms, a copyleft is the right of the author to enforce copyright restrictions by means of a copyright license on anyone wanting to use the work. These restrictions usually state that the work cannot be copied, altered, or used in any subsequent work unless the author of that work has agreed to grant the same copyleft rights.

Writers, artist, and creators use copyleft to allow anyone to use, share, and improve their work as a continuing process, while prohibiting people from sharing consequent works with any new restrictions. A widely used copyleft license is the GNU General
Public License (GPL), which is a widely used free software license.

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