har·ri·er 2 
(hărē-ər)
(hărē-ər)n.
1. A dog of a breed developed in England to hunt hares and rabbits, similar in appearance to but smaller than the English foxhound.
2. A cross-country runner.
[Middle English hairer, eirer, possibly alteration (influenced by hair, hare, hare) of Old French errier, wanderer, from errer, to wander; see ERR.]