noun one who rides on horseback; a horseman; a rider.
2. equestrian ·adj being or riding on horseback; mounted; as, an equestrian statue.
3. equestrian ·adj of or pertaining to horses or horsemen, or to horsemanship; as, equestrian feats, or games.
4. equestrian ·adj belonging to, or composed of, the ancient roman equities or knights; as, the equestrian order.