bun /bʌn/ noun [countableC] 1 British EnglishBrEDF a small round sweet cake 小圆甜糕点 2 DFa small round type of bread 小圆面包 a hamburger bun 用来做汉堡包的圆面包
5. have a bun in the oven BABY/HAVE A BABY British EnglishBrE informal to be pregnant – used humorously 怀孕,有喜〔幽默用法〕have a bun in the oven• Do I look like I have a bun in the oven?