- [countable]
a small round sweet cake 小圆甜蛋糕；小圆甜饼 an iced bun 加糖霜的小圆蛋糕
Oxford Collocations Dictionaryadjective- fresh
- cinnamon
- cream
- …
- eat
- have
- bake
- …
- [countable]
a small round flat bread roll 圆面包 a hamburger bun 一个用来夹汉堡饼的面包
Oxford Collocations Dictionaryadjective- fresh
- cinnamon
- cream
- …
- eat
- have
- bake
- …
- [countable]
long hair that has been twisted into a round shape and is worn on top or at the back of the head 圆发髻 
She wore her hair in a bun. 她盘了个发髻。 She pulled her hair back into a messy bun. 她把头发拢在后面盘成一个凌乱的发髻。 a woman with her hair in a loose bun 松松地挽了一个圆发髻的女人
Oxford Collocations Dictionaryadjective- neat
- severe
- tight
- …
- in a bun
- into a bun
- buns[plural] (slang, especially North American English)
the two sides of a person’s bottom 屁股
Word Originlate Middle English: of unknown origin.
Idioms
have a bun in the oven
- (informal, humorous)
to be pregnant 大肚子；怀孕