Where does this definition of upper school come from?
This entry for upper school is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is upper school a noun, verb, or something else?
In this entry, upper school is tagged as noun.
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.