From Longman Dictionary of Contemporary Englishgrad schoolˈgrad school noun [countable, uncountable] American English informalSEC a graduate school
Examples from the Corpus
grad school• After grad school, a series of grants allowed the peripatetic poet simply to write.• Besides, she was busy writing letters and filling out applications for grad school.• About five years later, I was in grad school in upstate New York.• It just got worse in grad school.• Should I drop out of grad school and move to Des Moines?• I had dropped out of grad school at the beginning of the semester.• They must go to grad school to calculate it. 