postgraduate
n.a student who has already finished their first degree and is now studying for a higher one, like a Master's or a PhD.
n.a student who has successfully completed an undergraduate degree and is pursuing further studies at a more advanced level.
“She is a postgraduate student studying history.”
“The university offers several scholarships specifically for postgraduates who are conducting original research in the sciences.”
“While undergraduates often focus on broad foundational knowledge, the postgraduate is expected to contribute original insights to their field through a thesis or a series of specialized seminars.”
Often used as a modifier before another noun (e.g., 'postgraduate studies').
“Nina, a postgraduate student, was supposed to be on holiday from her job as a live-in nanny in New York.”
From post- + graduate.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.