stableman n someone employed in a stable to take care of the horses Usage(s) He was a famed host, racing stableman, patron of the American Museum of Natural History. Thomas Augustus Watson was a livery stableman's son, a shy boy who roamed the woods declaiming poems to trees and stones. His father, a stableman, died when Keats was nine, and his mother remarried, unhappily. Synonym(s) stableboy groom hostler ostler