The Collaborative International Dictionary of English v.0.48:

Farrier \Far"ri*er\, v. i.
   To practice as a farrier; to carry on the trade of a farrier.
   [Obs.] --Mortimer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Farrier \Far"ri*er\, n. [OE. farrour, ferrer, OF. ferreor,
   ferrier, LL. Ferrator, ferrarius equorum, from ferrare to
   shoe a horse, ferrum a horseshoe, fr. L. ferrum iron. Cf.
   Ferreous.]
   1. A shoer of horses; a veterinary surgeon.
      [1913 Webster]

WordNet (r) 3.0 (2006):

farrier
    n 1: a person who shoes horses [syn: farrier, horseshoer]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

FARRIER. One who takes upon himself the public employment of shoeing horses.
     2. Like an innkeeper, a common carrier, and other persons who assume a
public employment, a farrier is bound to serve the public as far as his
employment goes, and an action lies against him for refusing, when a horse
is brought to him at a reasonable time for such purpose, if he refuse;
Oliph. on Horses, 131 and he is liable for the unskilfulness of himself or
servant in performing such work 1 Bl. Com. 431; but not for the malicious
act of the servant in purposely driving a nail into the foot of the horse,
with the intention of laming him. 2 Salk. 440.