n. 1 a small usu. sweetened bread roll or cake, often with dried fruit. 2 Sc. a rich fruit cake or currant bread. 3 hair worn in the shape of a bun. bun fight Brit. sl. a tea party. have a bun in the oven sl. be pregnant. hot cross bun a bun marked with a cross, traditionally eaten on Good Friday.
[ ME: orig. unkn. ]