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

Ceretti, meanwhile, wore a burgundy dress, with her hair done in a tight, slick-back bun. —Saman Shafiq, USA Today, 16 Mar. 2026

Also new is the Bacon Onion Jam Smashburger, a Black Angus beef burger with Nashville hot rub, white American cheese, pickles, bacon chipotle onion jam, shredded lettuce, El Gallo BBQ sauce and miso ranch served on a King’s Hawaiian bun. —Richard Guzman, Daily News, 16 Mar. 2026

Sipping tea and chomping on hot-cross buns from Gail’s, toasted with butter – luverly – certainly helped, though. —Baz Bamigboye, Deadline, 16 Mar. 2026

Elle Fanning was a modern-day princess, with her hair pulled taut into a low bun and her makeup fresh and skin-forward. —Kara Jillian Brown, InStyle, 16 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