Definition of bun
1 : a sweet or plain small bread; especially : a round roll
2 : a knot of hair shaped like a bun
3 buns plural : buttocks
Explore M-W
Origin and Etymology of bun
Middle English bunne
First Known Use: 14th century
Origin and Etymology of bun
perhaps from 1bun
First Known Use: 1898
BUN Defined for Kids
Medical Dictionary
BUN
play
noun
\ˌbē-ˌyü-ˈen\
Medical Definition of BUN
: the concentration of nitrogen in the form of urea in the blood
Learn More about bun
-
See words that rhyme with bun Spanish Central: Translation of bun Nglish: Translation of bun for Spanish speakers
Seen and Heard
What made you want to look up bun? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!