1. a student in the middle year or grade of a three-year program
Usage: primarily used in American educational contexts

Examples

• As a middler at the military academy, she had more privileges than the freshmen.
• The middlers organized a fundraiser for the school library.
• He’s a middler in law school, halfway through his degree.
• The middler class performed well on their comprehensive exams.
• Being a middler means you’re no longer the newest student but not yet a senior.