copyleft

/ˈkɑpiˌlɛft/
adjective
  1. Relating to or using a copyleft license.
    • They chose a copyleft model for their educational materials to promote free access.
    • The copyleft agreement requires that all derivative works also be open source.
    • Copyleft licenses are popular among developers who believe in collaborative innovation.
noun
  1. A licensing system that allows users to freely use, modify, and distribute a work (such as software or creative content), provided that all modified and distributed versions remain under the same open license.
    • The software is released under a copyleft license, so anyone can improve it but must share their changes.
    • Many open-source projects use copyleft to ensure the code stays free for everyone.
    • Copyleft is different from copyright because it encourages sharing rather than restricting it.
Antonyms
What does "copyleft" mean? | whatsthatwordmean | whatsthatwordmean