1. (n.) A member of a university or a college who has not taken his first degree; a student in any school who has not completed his course.

2. (a.) of or pertaining to an undergraduate, or the body of undergraduates.

autodidactic bookish cadet college-bred collegiate freshman graduate junior learned midshipman plebe postgraduate schoolboyish schoolgirlish senior soph sophomore sophomoric studentlike studious undergrad upperclassman