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

An affidavit attached to the warrant showed that one of the boys, said that Busfield had touched him on his genitals and buttocks. —Sharon Bernstein, Sacbee.com, 14 Jan. 2026

One of the brothers claims that Busfield rubbed his genitals and touched his buttocks during the production, per the warrant. —Ryan Coleman, Entertainment Weekly, 13 Jan. 2026

The victim was shot seven times, with wounds to his knee, thigh, forearm, biceps, buttocks and back of his leg. —Pj Green, Kansas City Star, 9 Jan. 2026

Large muscle groups such as the thighs and buttocks play a central role in regulating blood sugar and insulin sensitivity. —Desireé Oostland, Vogue, 8 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