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bun

1
[ buhn ]
/ bʌn /
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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.
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Origin of bun

1
1325–75; Middle English bunne, possibly of Romance origin; see also buñuelo

Other definitions for bun (2 of 3)

bun2
[ 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

Other definitions for bun (3 of 3)

BUN

abbreviation
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. 2021

How to use bun in a sentence

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

Medical 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.
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