bun Definition in the Cambridge English Dictionary

Definition of “bun” - English Dictionary

"bun" in American English

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bunnoun [C]

 us   /bʌn/

bun noun [C] (BREAD)

a ​small, round ​piece of ​bread, used for a ​sandwich, or a ​small, round, ​sweetbread: Buy some ​hamburger buns for ​supper.

bun noun [C] (KNOT)

hairarranged into a round ​knot at the back of the ​head
(Definition of bun from the Cambridge Academic Content Dictionary © Cambridge University Press)

"bun" in British English

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uk   us   /bʌn/

bun noun (FOOD)

B2 [C] a ​small, ​sweet, usually round ​cake: a ​cinnamon bunB2 [C] mainly US a ​small, round ​piece of ​bread, ​especially one that is ​cut horizontally and ​holds a ​burger: a ​hamburger bun

bun noun (HAIRSTYLE)

[C] a woman's ​hairstyle where the ​hair is ​brought together into a round ​shape at the back of the ​head: She ​wore her ​hair in a bun.

bun noun (BOTTOM)

[C usually plural] mainly US informal a ​buttock (= one ​side of a person's ​bottom)
(Definition of bun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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