Bread or bread-like baked goods of any sort.
Any of the ingredients for making bread, especially as commodities in trade and especially the principal ones, namely, flour/meal or the grain with which to mill it (such as wheat, oats, rye, or any other cereal grain).
A block of bread after baking.
Any solid block of food, such as meat or sugar.
A solid block of soap, from which standard bar soap is cut.
Shortened from "loaf of bread", the brain or the head (mainly in the phrase use one's loaf).
To headbutt (from loaf of bread)
To be in catloaf position (for cats or other animals)
To do nothing, to be idle.