This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Of or relating to horseback riding or horseback riders.

adj. Depicted or represented on horseback: an equestrian statue of a famous monarch.

n. One who rides a horse or performs on horseback.

adj. of horseback riding or horseback riders

n. an equestrian person; a horserider

adj. Of or pertaining to horses or horsemen, or to horsemanship.

adj. Being or riding on horseback; mounted.

adj. Belonging to, or composed of, the ancient Roman equities or knights.

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

Pertaining or relating to horses or horsemanship; concerned with horses or riding; consisting in or accompanied with performances on horseback: as, a person of equestrian tastes; an equestrian picture; equestrian feats, exercise, or sports.

Riding or represented as riding on a horse; exercising or mounted on horseback: as, equestrian performers; an equestrian statue of Washington.

Of or pertaining to the Roman equites or knights: as, the equestrian order. See equites.

n. A rider on horseback; specifically, one who earns his living by performing feats of agility and skill on horseback in a circus.

n. a man skilled in equitation

adj. of or relating to or featuring horseback riding

adj. of or relating to or composed of knights

"The Dutch have excelled in equestrian events, swimming, cycling, and rowing."

rider   

equestrienne   

picador    fox hunter    bronco buster    jockey    postillion    buster    horsewoman    postilion    roughrider    broncobuster   

equestrianism   

mounted    horseman    rider   

pedestrian   

knightly    martial    half-length    valorous    acrobatic    Grecian    histrionic    full-length    oratorical    theatrical