Schoolgirl/ˈskuːlɡɜːrl/ Definition 1 of 2Pro Tip 1/3Age Specific Refers to females typically under 18, hints at youth and school attendance. Many schoolgirls wear uniforms in private schools. Pro Tip 2/3Education Stage Often implies primary or secondary education, not college. The schoolgirls were practicing for their high school play. Pro Tip 3/3Possessive Modifier Can be modified to show association with a particular school. She is the Springfield High schoolgirl champion in math.