discourse (up)on (something)

discourse (up)on (something)

To talk about something at length. If he discourses about this abstract theory any longer, I'm going to fall asleep.See also: discourse

discourse (up)on

someone or something to lecture about someone or something. (Upon is formal and less commonly used than on.) I would like to discourse upon this matter awhile. The committee chose to discourse on Tom and his latest fiasco rather than deal with the budgetary problems it faces.See also: discourse, on