"Under-19" refers to individuals who are younger than 19 years old. This age category is often used in sports, education, and various youth programs to create age-appropriate competitions and activities. For example, many sports organizations have Under-19 teams to ensure that young athletes compete against peers of similar ages. In education, Under-19 students typically include those in high school or secondary education. This age group is crucial for personal development, as they often prepare for higher education or vocational training. Programs targeting Under-19 individuals focus on skill-building, leadership, and social development to help them transition into adulthood.