The meal that comes between Dinner and Breakfast. Brunch is the meal between Breakfast and Lunch. Since Breakfast comes first, it is used as the first part of the word and since lunch comes second, it is used as the second part of the word.
The meal you have with your friends after a long fun night. This meal usually occurs anywhere between midnight - 7am. It occurs at any 24hour actual sit down restaurant that does not have drive through. Usually Sharis, Dennys, Beths Cafe, or 13 Coins. Occassionally it happens at home after a long trip to any 24hour grocery store.
Having breakfast at your work desk in the morning, usually due to limited time and modern lifestyles. A staple of the office worker who has to be in early.