bun

1 of 2

noun (1)

ˈbən 

1

: a sweet or plain small bread

especially : a round roll

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

This top knot combines sleek, scalp-hugging braids with a structured bun to create a sculptural look worthy of its red carpet moment. —Omenaa Boakye, InStyle, 15 June 2026

The Grill, Chill & Stay Safe events will provide frozen hamburger patties, hot dogs, buns and watermelons in addition to other food options for Fresh Start Market shoppers. —Post-Tribune, Chicago Tribune, 14 June 2026

The singer paired the look with strappy black high-heel shoes, multiple rings and dangling earrings, choosing to wear her hair in a low bun with a few pieces left out, and blunt bangs. —Lori A Bashian, FOXNews.com, 14 June 2026

The oysters and brown butter lobster roll—the latter made with warm lobster meat and piled high on a pillowy soft bao bun—make vying for a parking spot and facing the ever-present waitlist more than worth it. —Jacqueline Dole, Travel + Leisure, 13 June 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

• have a bun in the oven
• iced 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