bun

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bun /ˈbʌn/ noun
plural buns
bun
/ˈbʌn/
noun
plural buns
Learner's definition of BUN
[count] : a small, round or long bread for one person to eat
[count] : a small, usually round sweet cake see also sticky bun
[count] : a way of arranging long hair by twisting it into a round shape at the sides or back of the head
buns [plural] US, informal : the two soft parts of the body that you sit on : buttocks

have a bun in the oven

informal
: to be pregnant
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