loaf UK /ləʊf/US /loʊf/noun 6verb 2forms 5phrases 2 noun6 •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. •(slang) Ellipsis of loaf of bread: the brain or the head. •(informal, slang) A catloaf. •A particular still life configuration with seven living cells.It runs for 17331 generations before stabilizing as 136 blinkers, 109 blocks, 65 beehives, 18 loaves, 18 boats, 7 ships, 4 tubs, 3 ponds, 2 toads, and 40 gliders. — 1989 verb2 •To do nothing, to be idle.They don’t (often) kill other animals, they probably form monogamous pairs, and we know they share parental care of chicks, and loaf and bathe in large, congenial groups. — 2015 •(slang) To headbutt formsloafed · loafing · loafs · loafs · loaves Phrases with loaf loaf aboutTo do nothing in particular; to be idle. loaf aroundto do nothing in particular, be idle.