The Collaborative International Dictionary of English v.0.48:

Girl \Girl\ (g[~e]rl), n. [OE. girle, gerle, gurle, a girl (in
   sense 1): cf. LG. g["o]r child.]
   [1913 Webster]
   1. A young person of either sex; a child. [Obs.] --Chaucer.
      [1913 Webster]

   2. A female child, from birth to the age of puberty; a young
      maiden.
      [1913 Webster]

   3. A female servant; a maidservant. [U. S.]
      [1913 Webster]

   4. (Zool.) A roebuck two years old. [Prov. Eng.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

girl
    n 1: a young woman; "a young lady of 18" [syn: girl, miss,
         missy, young lady, young woman, fille]
    2: a youthful female person; "the baby was a girl"; "the girls
       were just learning to ride a tricycle" [syn: female child,
       girl, little girl] [ant: boy, male child]
    3: a female human offspring; "her daughter cared for her in her
       old age" [syn: daughter, girl] [ant: boy, son]
    4: a girl or young woman with whom a man is romantically
       involved; "his girlfriend kicked him out" [syn: girlfriend,
       girl, lady friend]
    5: a friendly informal reference to a grown woman; "Mrs. Smith
       was just one of the girls"

The Free On-line Dictionary of Computing (19 January 2023):

GIRL

   Graph Information Retrieval Language.  A language for handling
   directed graphs.

   ["Graph Information Retrieval Language", S. Berkowitz, Report
   76-0085, Naval Ship Res Dev Center, (Feb 1976)].

   (1994-11-02)