1. a small round bread roll, often sweet
2. a hairstyle in which hair is twisted or pinned into a round shape at the back or top of the head

Examples

• She bought hamburger buns for the barbecue.
• The cinnamon buns smelled delicious in the bakery.
• He ordered a hot dog on a sesame seed bun.
• The ballerina wore her hair in a tight bun.
• She twisted her long hair into a messy bun.
• The teacher always kept her hair in a neat bun.
• Fresh buns were cooling on the kitchen counter.