(1):
(a.) Of or pertaining to horses or horsemen, or to horsemanship; as, equestrian feats, or games.
(2):
(a.) Belonging to, or composed of, the ancient Roman equities or knights; as, the equestrian order.
(3):
(n.) One who rides on horseback; a horseman; a rider.
(4):
(a.) Being or riding on horseback; mounted; as, an equestrian statue.