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

Kneel with your buttocks resting on your heels, supporting your weight through your toes. —Aubrey Bailey, Pt, Dpt, Cht, Verywell Health, 24 Jan. 2025

The school nurse found extensive bruising on her body and scrapes on her stomach, buttocks and knees. —Anthony G. Brown, Baltimore Sun, 19 Jan. 2025

The man, who has not been identified, has assaulted women by riding past them on his bike and slapping their buttocks, according to the Lakewood Police Department. —Lauren Penington, The Denver Post, 9 Jan. 2025

Questioned by a female officer, the child revealed another detail: that Olea had touched her chest and buttocks during a gymnastics move. —Ana Claudia Chacin, Miami Herald, 2 Jan. 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