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

There’s also the on-site Gorse Bakery, which sells excellent sourdough, blackberry buns, and rhubarb danishes. —Issy Von Simson, Travel + Leisure, 10 Mar. 2026

Diners can expect to nosh on bao, buns, dumplings and skewers, along with Uchi staples, with cushy seating inside and outside on the patio. —Heidi Finley, Charlotte Observer, 10 Mar. 2026

Wednesday, March 25, Chicken and Pickle Sandwich with whole grain bun, wedge potatoes, beans, tropical fruit, milk. —Ramona Sentinel, San Diego Union-Tribune, 10 Mar. 2026

The Blueberry Ghost Burger – habanero ghost pepper Monterey jack, onion rings, homemade blueberry marmalade on a potato bun – is not your grandmother’s diner fare. —Staff Report, Hartford Courant, 7 Mar. 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