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

Doctors typically prefer a cream or gel that’s applied to the skin, usually to the back of the thigh, calf, or buttocks. —Angela Haupt, TIME, 19 Feb. 2025

Your buttocks should hover in the air, and your knees should be bent at a 90-degree angle. —Katrina Carter, Verywell Health, 13 Feb. 2025

The former students’ lawsuit says some teachers, including Richard Kuch and Richard Gain, regularly touched students’ breasts, buttocks and groins to push them into straighter posture or higher leaps. —Sara Coello, Charlotte Observer, 3 Feb. 2025

This is when one or more players push the quarterback by their buttocks into the offensive and defensive lines. —Barbara A. Perry, Newsweek, 28 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