A loaf is a rounded or oblong mass of food, typically and originally of bread. It is common to bake bread in a rectangular bread pan, also called a loaf pan, because some kinds of bread dough tend to collapse and spread out during the cooking process.

What are the two meanings of loaf?

1 : a shaped or molded mass of bread. 2 : a shaped or molded often symmetrical mass of food. 3 British slang : head, mind. loaf.

What does when you loaf mean?

UK old-fashioned. used to tell someone in a slightly angry way to think more carefully about what they are doing.