Horseman Horse"man, n.; pl. {Horsemen}. 1. A rider on horseback; one skilled in the management of horses; a mounted man. [1913 Webster]

2. (Mil.) A mounted soldier; a cavalryman. [1913 Webster]

3. (Zo["o]l.) (a) A land crab of the genus {Ocypoda}, living on the coast of Brazil and the West Indies, noted for running very swiftly. (b) A West Indian fish of the genus {Eques}, as the light-horseman ({Eques lanceolatus}). [1913 Webster]

The Collaborative International Dictionary of English. 2000.