What is a Brown Bag Seminar? I have seen several questions and also announcements that mention the term "brown bag" seminar. I understand that in American English "brown-bagging" means bringing your own lunch:


  the practice of bringing one's own packed lunch to work.


I would like some sort of a definition in academic setting.
It means it's held around lunchtime and they aren't going to be providing lunch, but you are welcome to bring your own and eat during the event. So the event is somewhat informal.