stallion
n. countable C1 Advanced US //ˈstæɫjən// UK //stˈæliən// stal·lion
n. an adult male horse that has not been neutered and is able to father young horses.
n. an uncastrated adult male horse, typically kept for breeding purposes.
The black stallion ran across the field.
The farm owner decided to keep the stallion in a separate paddock to prevent any fighting with the other horses.
Prized for his exceptional lineage and powerful build, the stallion was retired from racing to begin a lucrative second career at the stud farm.
From Middle English stalion, from Middle French estalon (whence modern French étalon), of Germanic origin, akin to stall. Displaced native Old English henġest.
Usage
Often used in the context of horse breeding or equestrian sports to distinguish from a gelding or mare.