Postgraduate adj. Of, pertaining to, or designating, the studies pursued after graduation, esp., after receiving the bachelor's degree at a college; graduate. Note: Most careful writers consider the word graduate to be the proper word to use in this sense.
... of short but well-knit figure. Spectacles and a thoughtful face of great refinement gave him the student's stamp. His undergraduate course at college would end in a few weeks. Postgraduate work was to begin during the summer. An assistant professorship, then a full professorship—these were successive stations already marked by him on the clear track of life; and he was now moving toward them with straight and steady aim. Sometimes we encounter personalities which ... — The Mettle of the Pasture • James Lane Allen