copyleft means: Copyrights are not the same thing. You can redistribute or copy whatever you want. Anyone can make changes, additions, modifications, alternations or other improvements. However, users cannot limit access to base material for the modifications they make. (in Community Dictionary, added by Elisa Rodríguez)

What else does copyleft mean?

  • This type of licensing encourages software distribution at no cost for noncommercial purposes. (in AZ Dictionary)