1. formal speeches or written treatments of a subject
2. conversations or discussions

1. speaks or writes at length about a topic

Examples

• The professor’s discourses on philosophy were always thought-provoking.
• Academic discourses often use specialized terminology.
• The book contains several discourses on modern art.
• She discourses eloquently about environmental issues.
• He discourses on politics whenever given the chance.
• The panel featured discourses from leading scientists.
• The scholar discourses at length about ancient civilizations.