There is a micro-phenomenon of new wave, special snowflake directors that try to revolution the canons of classical opera. I saw Carmen being banged behind a burning car next to what looked like a flamenco-infused Thunderdome. That was in Paris opera, stronghold of modernist SJW nonsense.
Here, the expression is a shorter version of matriculation college. In a number of Canadian cities, many government-run secondary schools are called collegiates or collegiate institutes (C.I.), a complicated form of the word college which avoids the usual post-secondary connotation.
Provost(noun) a person who is appointed to superintend, or preside over, something; the chief magistrate in some cities and towns; as, the provost of Edinburgh or of Glasgow, answering to the mayor of other cities; the provost of a college, answering to president; the provost or head of certain collegiate churches.