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

Cathy Boots Five bullets had struck Harkness, 53, including in her back and buttocks. —Ruth Chenetz, CBS News, 31 May 2025

Pull your foot toward your buttocks to stretch the back of your thigh. —Claudia Herwig, Glamour, 20 May 2025

She had been stabbed in the chest and buttocks, and there was evidence of defensive wounds, the motion reads. —Chris Spargo, People.com, 16 Apr. 2025

Push down through your heels, squeeze your buttocks, and raise your hips off the floor, being sure not to arch your back. —Aubrey Bailey, Pt, Dpt, Cht, Verywell Health, 4 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