What's "drop out" mean? Can it only be used in school setting?

Native speaker’s answer
Rebecca
"Drop out" means to stop being involved in, going to, or participating in something, and it's used for a lot of things! In the context of school, it's when a student decides to no longer be a student, and they haven't finished their tuition. One can use this in other situations like clubs, classes, and careers. Ex: Last year, there were a few students who had to drop out of college for personal reasons. Ex: She decided to play in a soccer team for a couple of years, but dropped out because of an injury.