I'm pretty sure "Open source" is a legally protected phrase owned by OSI with a precise definition. It does have a precise definition (the OSD[1]), but OSI doe

I'm pretty sure "Open source" is a legally protected phrase owned by OSI with a precise definition. It does have a precise definition (the OSD[1]), but OSI does not own the phrase in the sense of owning a (registered) trademark on it. They applied for such a trademark decades ago, but ultimately abandoned the application IIRC. That said, registered trademark or no, the OSD is by far and away the most widely accepted and used definition of what it means to be "open source". I'd argue that it is a de-facto standard, albeit not a de jure standard. [1]: https://opensource.org/osd https://opensource.org/osd