copyleft

/K AA1 P IY0 L EH1 F T/
noun
  1. 1

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

    โ€œThey believe in copyleft because they want their software to be used freely by anyone.โ€

  2. 2

    A software license that follows this philosophy.

    โ€œI have placed my program under copyleft.โ€

verb
  1. 1

    To license under a copyleft license.

    โ€œLinus Torvalds copylefted the Linux kernel.โ€

Source: https://en.wiktionary.org/wiki/copyleft