noun

buttock

BUH-tuhk

noun

One of the two rounded fleshy parts that make up the rear of the body below the back.

"He landed hard on one buttock after slipping on the ice."

"The nurse gave the injection in the upper buttock."

The curved part of a ship's hull near the stern.

"The shipwright smoothed the curve of the buttock before painting."

How to Use Buttock

Learner’s notes

In plain EnglishUsually used in the plural, "buttocks," for the two halves of the backside.

Common pairings

clench your buttocks a firm buttock the left buttock

buttocks plural

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From Old English buttuc ("end piece; short strip of land"), with the -ock ending making it a diminutive — literally "little end piece."