American Dictionary

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Definition bun in American English

bun noun

[countable] noun
/bʌn/
1

a small round piece of bread

Example

a burger in a bun

Synonyms and related words
2

a hairstyle in which a woman's hair is tied in a tight round ball at the back of or on top of her head

Synonyms and related words
3

someone's buttocks

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4

a small round cake, especially with a sweet sticky surface

Synonyms and related words
Definition bun in American English