A name for a set of Web pages served by a WikiEngine (or a WikiClone). The server on which the software runs could be a WikiFarm. You are currently reading one page of a WikiForum, the WikiWikiWeb.
"WikiForum" solves the WikiSingleWordProblem, turning a particular meaning of "wiki" into a WikiWord. (See WikiHasManyMeanings.)
For a list, see WikiForums (and PublicWikiForums and NonPublicWikiForums).
Isn't the WikiSingleWordProblem addressed already by using the term WikiWiki?
And doesn't WikiForum refer more to a wiki that operates in ThreadMode like a forum, as opposed to a DocumentMode reference wiki such as WikiPedia?