upperclassman From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA junior or senior student in a school or college. Related wordsSynonymsunderclassmanupperclasspersonupperclasswomanupperseniorclassmansophomoresubjuniorjuniorunderclasswomansubseniorsenpaisenior higherclassmatepunyfreshman References Wiktionary — upperclassman Wikipedia — upperclassman