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

And one soggy bun, and the whole thing falls apart. —John Werner, Forbes.com, 31 May 2026

While the menu leans into comfort food classics like burgers, hearty breakfasts, and milkshakes, don’t miss the diner’s signature tenderloin, hand-breaded and served on a brioche bun with garlic mayo. —Lauren Dana Ellman, Midwest Living, 31 May 2026

Three of the top 10 burgers that made the list were from McDonald's, Five Guys and In-N-Out, all without buns. —Teresa Mull, FOXNews.com, 30 May 2026

Steamed pork buns were held below proper hot holding temperatures. —Veronica Fernandez-Alvarado may 29, Sacbee.com, 29 May 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