it’s not made up (well all language is made up but I digress), you’re just being flagrantly ignorant of the terms you’re using and their history. you can easily go read up on open source vs source available and the history of the terms/licenses

it’s also fine by me if you want to have your own definition; see other comments, I don’t personally 100% agree with OSI’s definition myself

One can find leaked Windows source code on the Internet. Is it open source?