The definition of a gelding is a castrated horse.(noun)
A male horse that has had his testicles removed is an example of a gelding.
See gelding in Webster's New World College Dictionary
Origin: ME < ON geldingr: see geld + -ing
See gelding in American Heritage Dictionary 4
Origin: Middle English
Origin: , from Old Norse geldingr
Origin: , from gelda, to geld.
Learn more about gelding