"substantive discussion" refers to a conversation or exchange of ideas that focuses on important and meaningful topics. It involves a thoughtful and meaningful discussion rather than superficial or casual chats. Full definition
I would have also liked to have seen a more substantive discussion of the political points that are being debated in this election. (iamaneducator.com)
This simple question is given greater weight, I believe, when we notice that contemporary politics completely devoid of almost any other substantive discussion about the future. (climate-resistance.org)
I also have received many letters from parents; they appreciate the assignment because, in many cases, the questions prove to be a jumping off point for substantive discussion with their children. (educationworld.com)