noun
advancing to graduate school; continuing to graduate studies
Refers to the act of entering a graduate program (master's or doctoral) after completing an undergraduate degree. Often used in educational contexts.
彼は大学院進学を希望している。
He hopes to go on to graduate school.
大学院進学の準備として、研究計画書を書いた。
As preparation for graduate school, I wrote a research proposal.
Compound of 大学院 (graduate school) and 進学 (advancing to a higher school).