1. a young female horse, typically under four years old

Examples

• The filly galloped across the meadow with her mother.
• They bought a beautiful bay filly at the horse auction.
• The trainer worked patiently with the young filly.
• This filly shows great promise as a racehorse.
• The mare gave birth to a healthy filly in spring.
• The filly will be old enough to ride next year.