In my field we call these norms ground rules. Beforehand we have everyone agree to the ground rules (like: no interrupting or framed as a positive action, like let everyone finish their sentences). I love them, because they set the stage of workable behaviors and it is easy to remind everyone of them when someone gets a little ahead of themselves and starts cutting off others or displays other unworkable behavior.

When the opportunity of ground rules isn’t used, pausing the content and setting boundaries/ working on the process during the meeting is also acceptable and can smoothen out a meeting.

Well said, Charles. Thank you.

Then the meeting organizer gate keeps – if someone shoots down an idea, they simply say “Remember, we are writing down all ideas – sometimes something that doesn’t seem possible is actually a great idea, other times it isn’t. If we don’t hear people out, we could miss an opportunity. (Name of person cut off), please go on about your idea.”

If it continues, then you have the crucial conversation with the person, off line. if necessary, take a break and address the disruptive behavior that is outside of the agreed norms.