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 crease-free ties are customizable for every hair type and style -- four loops for thick hair, two loops for regular ponytails or messy buns, and baby loops for braids or fine hair. —ABC News, 11 May 2026

But the collective effort behind those hot cross buns and front-porch flags? —Fran Moreland Johns, The Atlantic, 11 May 2026

New items include a smash burger with bacon, cheese and thousand island dressing on a pretzel bun, a three cheese sandwich and roasted tomato soup, a turkey, bacon and Swiss cheese sandwich and a cob salad with habanero pork belly. —Carlos Rico, San Diego Union-Tribune, 8 May 2026

Plates like roasted bone marrow with beef tartare, lobster steam buns, and Dimock butter cake with popcorn comprise the menu, which is notably devoid of any seed oils. —Taryn Shorr-McKee, Midwest Living, 8 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