No. Call that "source available", "source access" or something, but "Open Source" is pretty much established to be defined by the OSI definition of the term: https://opensource.org/osd
We have discovered that there is virtually no chance that the U.S. Patent and Trademark Office would register the mark "open source"; the mark is too descriptive. Ironically, we were partly a victim of our own success in bringing the `open source' concept into the mainstream.
https://news.slashdot.org/story/99/06/17/0213251/esr-on-the-...
"Open source" as a term or development methodology is older than both the OSI definition and the Debian manual it is based on.