Older versions of the page can be seen here:
https://en.wikipedia.org/w/index.php?title=Recession&oldid=954008074
Going back all the way to the very first article it was prominently defined as a fall in GNP for 2 successive quarters.
2003: https://en.wikipedia.org/w/index.php?title=Recession&oldid=755277
At some point that definition was moved down to the bottom of the 1st paragraph and labelled as a "UK definition", as it stands now. There have been almost 100 edits made to the page between 25th and 29th of July:
Older versions of the page can be seen here:
https://en.wikipedia.org/w/index.php?title=Recession&oldid=954008074
Going back all the way to the very first article it was defined as a fall in GNP for 2 successive quarters.
2003: https://en.wikipedia.org/w/index.php?title=Recession&oldid=755277