Wiktionary
n. (context UK US English) A university student, usually already possessing a four year degree, who is working on a master's degree or Ph.D.
WordNet
n. a student who continues studies after graduation [syn: grad student, postgraduate]
Usage examples of "graduate student".
John Gigg, the graduate student who had replaced Roger Mason amid the welter of cables and oscilloscopes - now jazzed up with some rather more sophisticated computing gear, which took much of the steam out of interpreting the data - was set to map the time course of the 'bursting' on the neurons in IMHV, and look at the LPO as well.
I didn't really know what I wanted to study, I didn't even know if I wanted to rent a room or an apartment in Amherst, but I was scheduled to be a full-time graduate student there.
While I was still a graduate student at Princeton, I worked as a research assistant under John Wheeler.
When Rob, the first graduate student whose thesis he had directed, had left Harvard to begin an instructorship at Canterbury College, he had vowed eternal gratitude.
He's a graduate student in English and a member of the carpenter's union.
Enough to say that Alvin had never had a graduate student so quick to grasp new ideas, so eager to devise newer ones of his own.