filly

noun

fil·​ly ˈfi-lē 

plural fillies

1

: a young female horse usually of less than four years

2

: a young woman : girl

Synonyms of filly

• girl
• lass

Examples of filly in a Sentence

she's still a filly, so she has plenty of time to decide what she wants to do in life

Recent Examples on the Web

Five older fillies and mares were entered in the 61/2-furlong sprint on the main track. — Bill Center, San Diego Union-Tribune, 17 Aug. 2026

The Alcibiades and Jessamine are also worth watching because both are for two-year-old fillies, meaning the field is making its first serious appearance on a big stage. — Jill Barth, Forbes.com, 7 Aug. 2026

Later, three-year-old fillies take center stage in the Grade 3 Lake George Stakes on the inner turf course before the Grade 2 Jim Dandy Stakes headlines the card. — Geoff Clark Outkick, FOXNews.com, 1 Aug. 2026

This day in sports history 1946 — Two-year-old fillies Chakoora and Uleta become the first thoroughbreds to complete a transcontinental flight. — Assistant Sports Editor, Los Angeles Times, 29 May 2026

Word History

Etymology

Middle English fyly, from Old Norse fylja; akin to Old English fola foal

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for filly

• billie
• billy
• chilli
• chilly
• dilly
• frilly
• gillie
• gilly
• hilly
• lily
• philly
• really

Kids Definition

filly

noun

fil·​ly ˈfil-ē 

plural fillies

: a young female horse usually less than four years old