The world really lost something when the word "wiki" got hijacked and started being applied to very un-wiki things.
www.mediawiki.orgDifferences between Wikipedia, Wikimedia, MediaWiki, and wiki - MediaWiki
As used today (thanks, GitHub) "wiki" most commonly means "a pile of Markdown/wikitext/whatever files that exist, somewhere; you might be able to figure where that is and which one corresponds to the page you want to change and then submit it for approval to decide whether those changes will be accepted".
Applying the word "wiki" to that paradigm flies in the face of the very etymology of the word.