Comment by pgeorgi

That article you post as [1] refers to https://opensource.org/osd/ for "The official definition of open source software (which is published by the Open Source Initiative and is too long to include here)"

The FSF article directly follow with this, which contradicts your claim: "However, the obvious meaning for the expression “open source software” is “You can look at the source code.” Indeed, most people seem to misunderstand “open source software” that way. (The clear term for that meaning is “source available.”) That criterion is much weaker than the free software definition, much weaker also than the official definition of open source. It includes many programs that are neither free nor open source."

And the OSD also disagrees: "The license must allow modifications and derived works, and must allow them to be distributed under the same terms as the license of the original software."

Terms that can be summarized as "whose source code is available to the public" are called "source available", even by the FSF.