filly

/ˈfɪli/
noun
  1. A young female horse, usually under four years old.
    • The farmer led the filly into the stable for her first night.
    • At the ranch, the children loved watching the filly run across the field.
    • The trainer began working with the filly to prepare her for the race.
  2. A lively or spirited young woman (informal, sometimes playful).
    • My aunt is still a young filly at heart, always ready for an adventure.
    • In the old movie, the heroine was a bold filly who rode her horse into town.
    • Grandma laughed and called me a frisky filly when I danced around the kitchen.