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

Michelle Obama’s effortless updo, styled by hairstylist Yene Damtew, for one, required nothing but a loose side bang and low bun. —Essence, 12 Jan. 2026

Keeping the same ultra-deep side part from earlier, Hathaway styled her hair into an elegant asymmetrical bun. —Lara Walsh, InStyle, 12 Jan. 2026

With her signature long waves gathered into a subtle bun at the nape of her neck, this style puts the focus on the sculptural wave framing Seyfried's face opposite a deep side part. —Grace McCarty, Glamour, 12 Jan. 2026

Her shortest layers have been deeply side-swept into a gorgeous, retro wave—Campora used the GHD Chronos Curve Curling Iron and ensured the shape wouldn't shift with Joico Heat Hero High Hold + Shine Boosting Finishing Spray—while the bulk of her hair is drawn up into a sophisticated, low bun. —Marci Robin, Allure, 12 Jan. 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
• 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