noun
A man who rides a horse.
A soldier on horseback, especially a cavalryman.
A man skilled in horsemanship, especially an equestrian.
(especially UK, agriculture, archaic) A man in charge of work horses; a teamster.
(especially UK, archaic) A man in charge of transport horses; a hostler (ostler).
(archaic) Any of the swift-running land crabs of the genus Ocypode.
(archaic) Any fish of the genus Equetus.
A fictional beast that is part horse and part man.