/ bʌn; NAmE / noun
1.
[ C ] ( BrE ) a small round sweet cake :
an iced bun
—see also hot cross bun
2.
[ C ] ( BrE also bap ) a small round flat bread roll :
a hamburger bun
—compare roll
3.
[ C ] long hair that has been twisted into a round shape and is worn on top or at the back of the head :
She wore her hair in a bun.
4.
buns [ pl. ] ( slang , especially NAmE ) the two sides of a person's bottom
•
IDIOMS
- have a bun in the oven
••
WORD ORIGIN
late Middle English : of unknown origin.