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.
Some private secondary schools (such as Upper Canada College, Vancouver College) choose to use the word college in their names nevertheless. Some secondary schools elsewhere in the country, particularly ones within the separate school system, may also use the word college or collegiate in their names. In New Zealand the word college normally refers to a secondary school for ages 13 to 17 and college appears as part of the name especially of private or integrated schools.