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

Justin’s milkbread bun (for which Jennifer made the dough) was wonderful, but the pork in his sandwich was underseasoned, and there wasn’t enough of it. —Roxana Hadadi, Vulture, 14 Apr. 2026

Oh My Burger in the Coachella Courtyard, with thick single or double smashburgers generously doused in a spicy special sauce with pickles and melted cheese on a croissant bun. —Senior Food Editor, Los Angeles Times, 14 Apr. 2026

Moffett’s restaurant group has multiplied with Italian eatery Stagioni, its sister cocktail bar Sala, and a ramen-and-bun shop called Bao and Broth. —Tara Massouleh McCay, Southern Living, 13 Apr. 2026

For her second headband look, Diaz wore a leopard print hair accessory with her messy bun. —Meg Walters, InStyle, 11 Apr. 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