buttock

noun

but·​tock ˈbə-tək 

also -(ˌ)täk

1

: the back of a hip that forms one of the fleshy parts on which a person sits

2

buttocks plural

a

: the seat of the body

b

: rump sense 1a

Synonyms of buttock

• cheeks
• bum
• seat
• tail
• rump

Examples of buttock in a Sentence

she slipped in the mud puddle and hit the ground square on her buttocks

Recent Examples on the Web

Kwoba still needs surgery to remove fragments from his buttocks and back thighs. —Larry Madowo, CNN Money, 4 Feb. 2026

Baboons will show their buttocks to others before walking away; the entire troop then departs. —Shayla Love, New Yorker, 4 Feb. 2026

The lawsuit accuses Smith of grooming the boy and touching him inappropriately, including rubbing his buttocks and pressing his own body against the boy's while he was seated at his desk. —Sabrina Franza, CBS News, 30 Jan. 2026

Blisters or itchy red bumps around the navel that spread to other areas of the body (such as the abdomen, buttocks), a condition known as Pemphigoid gestationis. —Alex Vance, Parents, 29 Jan. 2026

Word History

Etymology

Middle English buttok — more at butt entry 1

First Known Use

13th century, in the meaning defined at sense 1

Kids Definition

buttock

noun

but·​tock ˈbət-ək 

1

: the back of the hip which forms one of the fleshy parts on which a person sits

2

plural

a

: the seat of the body

b

: rump sense 1a

Medical Definition

buttock

noun

but·​tock ˈbət-ək 

1

: the back of a hip that forms one of the fleshy parts on which a person sits

2

buttocks plural : the seat of the body

also : the corresponding part of a quadruped : rump