(sports) The bottom part of e.g. a sports table, listing how well teams have played over a period of time. All teams that end up in the relegation zone are relegated.
2010 December 28, Marc Vesty, “Stoke 0 - 2 Fulham”, in BBC:
The Cottagers had previously gone eight games without a win and had slipped into the relegation zone over Christmas, with boss Hughes criticised by fans after their 3-1 home defeat by fellow basement battlers West Ham on Boxing Day.