noun, noun or participle which takes 'suru', intransitive verb
spirited discussion; lively debate
A yojijukugo describing a discussion where ideas are exchanged freely and energetically, often with eloquence. Can be used as a noun or with する to mean 'to have a spirited discussion'.
会議では参加者たちが談論風発し、新しいアイデアが次々と出された。
At the meeting, the participants engaged in spirited discussion, and new ideas were brought up one after another.
彼の講演の後、談論風発の質疑応答が行われた。
After his lecture, a lively Q&A session took place.