Free software as described by GNU.org, “The four essential freedoms. A program is free software if the program’s users have the four essential freedoms:
The freedom to run the program as you wish, for any purpose (freedom 0).
The freedom to study how the program works, and change it so it does your computing as you wish (freedom 1). Access to the source code is a precondition for this.
The freedom to redistribute copies so you can help others (freedom 2).
The freedom to distribute copies of your modified versions to others (freedom 3). By doing this you can give the whole community a chance to benefit from your changes. Access to the source code is a precondition for this.” from GNU.org https://www.gnu.org/philosophy/free-sw.en.html
Open source as described by OpenSource.com, “The open source way is about applying the principles of open source software development beyond software. Beyond technology. Opensource.com is about sharing how the open source way can change our world in the same way the open source model has changed software.” https://opensource.com/open-source-way