filly Meaning, Definition & Usage

  1. noun a young female horse under the age of four

WordNet

Fil"ly noun
Etymology
Cf. Icel. fylia, fr. foli foal. See Foal.
Wordforms
plural Fillies
Definitions
  1. (Zoöl.) A female foal or colt; a young mare. Cf. Colt, Foal.
    Neighing in likeness of a filly foal. Shak.
  2. A lively, spirited young girl. Colloq. Addison.

Webster 1913