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equestrian

adjective

of or relating to horseback riding or horseback riders: equestrian skill.
mounted on horseback: equestrian knights.
representing a person mounted on a horse: an equestrian statue.
pertaining to or composed of knights or mounted warriors: an equestrian code of honor.
of or relating to the ancient Roman equites.

noun

a person who rides horses.

adjective

of or relating to horses and riding
on horseback; mounted
depicting or representing a person on horsebackan equestrian statue
of, relating to, or composed of Roman equites
of, relating to, or composed of knights, esp the imperial free knights of the Holy Roman Empire

noun

a person skilled in riding and horsemanship

adj.

1650s, formed in English from Latin equester (genitive equestris) “of a horseman,” from eques “horseman, knight,” from equus “horse” (see equine). As a noun, “one who rides on horseback,” from 1791. The pseudo-French fem. equestrienne is attested from 1848.