''For other uses of the word see:- Colt

A Colt is a young male horse under the age of four. A horse that is older than four years of age which has not been desexed is known as a "stallion". Although, if a male horse has been desexed(gelded) it is known as a "gelding"

A female horse which is under four years of age is known as a filly.

Horses