People or things that run faster than others.
Outrunners are usually seen as fast and maybe a little bit special.
Examples:
The cheetah is one of the outrunners of the animal kingdom.
The outrunners in the race finished first.
The rabbit is an outrunner because it runs very fast.
The outrunners zoomed past everyone else.
In the story, the hero's horse was an outrunner, able to outrun any other horse.
The outrunners dashed ahead, leaving everyone else behind.