Tennis. an attendant, usually a girl or young woman, employed to retrieve balls and supply players with them.
Baseball. an attendant, usually a girl or young women, who retrieves foul balls and brings the umpire new balls during the game.
Origin of ball girl
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019