A colt is a male horse that's younger than four years old. When your colt is older than four, you can call him a stallion, gelding, or simply a horse.

There are many terms for horses, depending what age they are and whether they're male or female. While colt can only refer to a young male, and a female of a similar age would be called a filly, you can talk about a horse of either sex that's between one and two years old as a yearling. The word colt comes directly from Old English, and it originally meant "young ass," or "young camel."

Definitions of colt
  1. noun
    a young male horse under the age of four
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    ridgel, ridgeling, ridgil, ridgling
    a colt with undescended testicles
    type of:
    an animal that produces gametes (spermatozoa) that can fertilize female gametes (ova)
    a young horse
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