Underclassman
ahd-5
noun.
A student in the freshman or sophomore class at a secondary school or college.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
The opposite of an
upperclassman
; a
freshman
or
sophomore
.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
an undergraduate who is not yet a senior