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

Ratajkowski pulled her dark hair back in a sleek bun and accessorized with black oval sunglasses, showing off a glimpse of her plunging black bra in a semi-sheer, ab-baring black turtleneck. —Lara Walsh, InStyle, 17 Feb. 2026

Of course, in addition to the furniture, the store will offer IKEA favorites like meatballs, plant balls, hot dogs, veggie dogs, plant dogs, cinnamon buns and more. —Josh Kelly, Oklahoman, 17 Feb. 2026

She is known for her perfectly coiffed buns; my baby hairs, on the other hand, refuse to fall in line. —Conçetta Ciarlo, Vogue, 17 Feb. 2026

The bakery will also add new milk bun flavors — like Matcha Dumpling and Pink Berry Pretzel — to its line-up. —Lucia Cheng, Des Moines Register, 17 Feb. 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