bun

1
[ buhn ]
/ bʌn /

noun

any of a wide variety of variously shaped bread rolls, usually leavened and slightly sweetened or plain, sometimes containing spices, dried currants, etc.
hair gathered into a round coil or knot at the nape of the neck or on top of the head in certain coiffures.
buns, Slang. the buttocks.

Origin of bun

1
1325–75; Middle English bunne, of obscure origin

Definition for bun (2 of 3)

bun

2
[ buhn ]
/ bʌn /

Idioms

have a bun on, Slang. to be intoxicated: Everyone at the party seemed to have a bun on.

Origin of bun

2
First recorded in 1900–05; of uncertain origin

Definition for bun (3 of 3)

BUN

blood urea nitrogen: the concentration of nitrogen in the blood in the form of urea, indicating kidney function.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bun

British Dictionary definitions for bun

bun

/ (bʌn) /

noun

a small roll, similar to bread but usually containing sweetening, currants, spices, etc
any of various types of small round sweet cakes
a hairstyle in which long hair is gathered into a bun shape at the back of the head
have a bun in the oven slang to be pregnant

Word Origin for bun

C14: of unknown origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for bun

BUN

abbr.

blood urea nitrogen

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.