ˈgraduate ˌschool noun [uncountable and countable]
American English a college or university where you can study for a MASTER’S DEGREE or a doctorate after receiving your first degree, or the period of time when you study for these degrees

[TahlilGaran] Dictionary of Contemporary English ▲

university a place where you can study a subject at a high level to get a degree:
Harvard University
About a third of the pupils go on to university.
college in Britain, a place where you can study after you finish secondary school, especially to train for a job. In the US, a place where you can study and get a bachelor’s degree:
She’s at teacher training college.
the Royal College of Music
Where did you go to college?
community college (also junior college) American English a school that students can go to for two years in order to learn a skill or prepare for university:
Community colleges can provide job-specific training.
graduate school a college or university where you can study for a master’s degree or a doctorate, after receiving your first degree:
I taught for a few years, and then went back to graduate school.

[TahlilGaran] English Thesaurus ▲