Equestrian /(?)/

E·ques·tri·an

Equestrian

a.
  1. Of or pertaining to horses or horsemen, or to horsemanship; as, equestrian feats, or games.
  2. Being or riding on horseback; mounted; as, an equestrian statue.
    An equestrian lady appeared upon the plains.
    — Spectator.
  3. Belonging to, or composed of, the ancient Roman equities or knights; as, the equestrian order.

Equestrian

n.
  1. One who rides on horseback; a horseman; a rider.