upperclassman編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看upperclassmanupperclassman — 名詞名詞1. A student in the junior or senior year of high school or college.1.名詞釋義高年級生A student in the junior or senior year of high school or college.例句The upperclassman helped the freshmen find their classroom.