World Record
From Speedsolving.com Wiki
The world record (or WR) for an official event is the best known result achieved in an official solve in competition for that event, up to a certain point in time. This is accompanied by an official world rank of 1 in that event, and is thus the highest possible honor a solve can have. World records usually do not last for more than a year or so, although there have been some exceptions.
The WR for 3x3 is considered by far the most important, because it is the most popular event for cubers and non-cubers alike. The WR single time for this event has, however, recently been held by a lucky solve (that is, one which skipped a step), so it is not the best measure of speed.
