Help:FREEZE

If you look at the history of certain pages which were originally imported from Wikispaces, you will see an revision in the listing from the user "Wikispaces>FREEZE." This signifies that the revision in question was current when the Wikispaces was frozen for editing (July 16, 2018).

However, the literal definition is boring, so the name FREEZE is commonly used as the name of the wikispaces to MediaWiki conversion engine.