This is more of a definition question than anything. Officially, it's Multisite, but everyone still refers to it as MU. The plugins, the support sites, everything. Even 3/4 of the questions on this site about it refer to it as MU.

Should we care, and if we do, what can we do about it?

2 Answers 2


Well I see

and -- since this site is about wordpress, I favor merging that into perhaps as a synonym.

Ah, never mind, that is already the case


So I will complete the merge.

Beyond that I recommend working "mu" into the body of posts that talk about multisite for best search coverage, since the tag will be part of the title most of the time.


mu has a second meaning: The mu-plugins directory is for must use plugins, which cannot be turned off. Plus, it is easier to search for multisite than for mu. Therefore, the use of a naked mu tag should be strongly discouraged, imho.

  • Like the one I used, lol
    – Dan Gayle
    Commented Mar 22, 2011 at 16:59

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