[y0ghur7_xxx]

The OSI definition of "open source" is not the only definition. I would argue that most people see "open source" as software where the source is "visible" (no data to back that up).

Then you have a gazillion of "Open source licenses", that can be less "free" to more "free", like BSD, GNU, MIT, Apache, the free source license, ...

[c22]

My definition of open source is software where I can modify the source and use the resulting modified software without unnecessary roadblocks or fear of legal reprisal.