Definition of graduate school noun from the Oxford Advanced Learner's Dictionary

 

graduate school

 noun
noun
BrE
 
; NAmE
 
(informal grad school)(both North American English) Higher education institutions
 
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a part of a college or university where you can study for a second or further degree See related entries: Higher education institutions Culture Students must do well in the Graduate Record Examination to be accepted. Graduate school degrees include the master's degree and PhD.
See the Oxford Advanced American Dictionary entry: graduate school