Breakfast comes from two plain ideas: break and fast. Here, fast means a period of not eating. While you sleep, you usually go for many hours without food. When you eat again in the morning, you break the fast.
That is the literal idea behind the word. It is not just a label for a morning meal. It describes the action of eating after an overnight pause from food.
A simple example makes it clear. If you finish dinner at 8 p.m. and do not eat again until 7 a.m., your body has gone about 11 hours without food. When you eat toast, fruit, eggs, or anything else at 7 a.m., that meal breaks your fast. That is breakfast.
The same word fast appears in other contexts too, where it still means not eating for a time. But in everyday English, breakfast is the common word most people use for the first meal of the day.
- Fast: a period without food
- Break a fast: eat after that period ends
- Breakfast: the meal that ends the overnight fast