Steward

Stewards are an exclusive, restrictive  of select on some specific -powered wiki sites.

On  (WMF) wikis, stewards are very specific administrators across all WMF wikis and projects of the Wikimedia Foundation, as far as their technical abilities go. They are not supposed to use their privileges, unless requested by the local communities. They have their own private wiki, the Wikimedia Steward Wiki. For further information, see the Stewards page on the Wikimedia Meta-Wiki.
 * ''Wikimedia Foundation

In respect of the  wiki farm, stewards are the founding bureaucrats of ShoutWiki sites, with the ability to edit rights.
 * ''ShoutWiki