名詞 bun:

1. small rounded bread either plain or sweet
   同義詞：roll

1. He stole a bun from the shop.
   他從店里偷了一個圓面包。
2. There are some currants in this bun.
   這個圓面包里有些葡萄干。
3. He put a fillet steak in the bun.
   他把一片無骨牛排放進(jìn)小圓面包里。
4. A sandwich made with a patty of ground meat usually in a roll or bun.
   漢堡包一種三明治，通常在面包卷或小面包中夾入這種碎牛肉餅制成
5. I bought some buns for tomorrow's breakfast.
   我買了幾個圓面包當(dāng)明天的早餐。
6. She wears her hair in a bun.
   她把頭發(fā)盤成一個髻。

bun

n.（名詞）
A small bread roll, often sweetened or spiced and sometimes containing dried fruit.
小圓面包：一種甜的或奶香料的，有時還有干果的小面包圈
A tight roll of hair worn at the back of the head.
圓髻：腦袋后面結(jié)緊的發(fā)髻

來源：
Middle English bunne
中古英語 bunne
probably from Old French bugne [boil]
可能源自 古法語 bugne [煮沸]
[of Celtic origin]
[起源于凱爾特語]

bun
bun 2

n.Slang （名詞）【俚語】
A drunken spree.
酒宴，鬧飲

來源：
[Origin unknown]
[語源不詳]

bun
bun 3

n.Slang （名詞）【俚語】
One of the buttocks.
半邊屁股

來源：
Dialectal [hind part of a rabbit or squirrel]
方言 [兔子或松鼠的后半部]
from Scottish Gaelic [stump, bottom]
源自 蘇格蘭的蓋爾語 [樹樁，底部]
from Old Irish
源自 古愛爾蘭語