bun

1 of 2

noun (1)

ˈbən 

1

: a sweet or plain small bread

especially : a round roll see also sticky bun

2

: a knot of hair shaped like a bun

3

buns plural : buttocks

bun

2 of 2

noun (2)

: load sense 4

Synonyms of bun

Noun (1)

• cheeks
• tail
• bum
• seat
• rump

Examples of bun in a Sentence

Noun (1)

an exercise to firm your buns

Recent Examples on the Web

Noun

Brats in buns were piled high with brown mustard and sauerkraut, while a sausage sampler platter (for $18) featured three types of German sausages and spaetzle. — Camila Pedrosa, Sacbee.com, 11 Oct. 2026

Allow to cool in the pan until warm, about 30 minutes, before icing the buns. — ABC News, 8 Oct. 2026

For glam, Pugh turned to hairstylist Hyungsun Ju, who created an elevated messy bun and styled her fringe to frame her face. — Julia Teti, Footwear News, 7 Oct. 2026

Guests can choose to grab a smoothie and pastry to go or enjoy a leisurely breakfast of bacon and egg sammys on brioche buns or a forest mushroom and goat cheese omelet. — Condé Nast, Condé Nast Traveler, 6 Oct. 2026

Word History

Etymology

Noun (1)

Middle English bunne

Noun (2)

perhaps from bun entry 1

First Known Use

Noun (1)

14th century, in the meaning defined at sense 1

Noun (2)

1898, in the meaning defined above

Phrases Containing bun

• cinnamon bun
• have a bun in the oven
• iced bun
• man bun
• sticky bun

Rhymes for bun

• done
• dun
• fun
• gun
• hun
• jun
• none
• nun
• one
• pun
• run
• shun

Kids Definition

bun

noun

ˈbən

1

: a sweet or plain small bread

especially : a round roll

2

: a knot of hair shaped like a bun

Medical Definition

BUN

noun

ˌbē-ˌyü-ˈen 

: the concentration of nitrogen in the form of urea in the blood