There is a canonical definition of open source by the OSI[1] This is generally called source available or public source, like the Unreal Engine, rather than op

There is a canonical definition of open source by the OSI[1] This is generally called source available or public source, like the Unreal Engine, rather than open source, which implies you can actually do something with that source code. [1] https://en.wikipedia.org/wiki/The_Open_Source_Definition https://en.wikipedia.org/wiki/The_Open_Source_Definition