Discourse upon
Definition 1 of 1
Pro Tip 1/3Often Formal
Used in academic or formal discussions, not casual conversations. 
In the symposium, the professor will discourse upon the implications of climate change.
Pro Tip 2/3Extended Discussion
Implies a thorough and possibly lengthy discussion, not a brief mention. 
She will discourse upon Victorian social norms in her upcoming book.
Pro Tip 3/3Subject Depth
Indicates deep understanding or expertise on the subject being discussed. 
The scientist discoursed upon the new findings with great detail.