upperclassmen From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA junior or senior student in a school or college. Related wordsSynonymsupper classunderclassmenfreshman classcollegianssophomoressophomore classundergraduatesupper crustseniorsfreshmenjunior classcollegiategraduatesfreshmanaristocratsstudents References Wiktionary — upperclassmen Wikipedia — upperclassmen