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

• backside
• behind
• booty [slang]
• bootie
• bottom
• breech
• bum
• buns
• butt
• caboose
• can
• cheeks
• derriere
• derrière
• duff
• fanny
• fundament
• hams
• haunches
• heinie [slang]
• hunkers
• keister [slang]
• keester
• nates
• posterior
• rear
• rear end
• rump
• seat
• tail
• tail end
• tush [slang]

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

On the way toward the door, Ewing threw a butcher’s knife, stabbing him in the buttock, records show. —Meredith Colias-Pete, Chicago Tribune, 15 May 2025

The assistant director, now 34, testified that the actor had touched her breasts and buttocks on three occasions on the set in Paris. —Catherine Porter, New York Times, 13 May 2025

The assistant director reported in her complaint that Depardieu had touched her buttocks in the street, then touched her breasts a few days later on location and touched her buttocks again on another occasion. —Elsa Keslassy, Variety, 13 May 2025

Her friend tried to help her up, but Askins said she was then shot in her buttocks. —Faith Abubey, ABC News, 18 Apr. 2025

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