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

The rest of the hair is then gathered into a small, pastry-like bun at the top of the head, with tendrils typically left out to frame the face or brush over one eye. — Kara Nesvig, Allure, 13 Aug. 2026

The chain replaced its soft bun with a more sturdier version, changed the recipe for its mayonnaise and now serves it in a box instead of wrapped in paper. — Jordan Valinsky, CNN Money, 12 Aug. 2026

Everything is topped with signature Bae sauce and served on a potato bun. — Heidi Finley, Charlotte Observer, 12 Aug. 2026

The grilled Spam and cheese sliders ($16), with thin slices of Spam seared crisp served on Hawaiian buns with pineapple-jalapeno chutney, are a flavor bomb. — Sean Timberlake, Sacbee.com, 7 Aug. 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