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Synonyms

backside

American  
[bak-sahyd] / ˈbækˌsaɪd /

noun

  1. the rear or back part or view of an object, person, scene, etc.; that part which is opposite the front.

  2. rump; buttocks.


backside British  
/ ˌbækˈsaɪd /

noun

  1. the back of something

  2. informal the buttocks

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of backside

1350–1400; Middle English back syde; see back 1, side 1; compare Old English bæce backside

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

And have the most important play happen while some latecomer blocks your view with his backside while trying to find his seat.

From The Wall Street Journal • May 7, 2026

They just needed a kick up the backside, and they certainly got one of those from United.

From BBC • Jan. 25, 2026

A spider can flick off irritating hairs from the backside of its abdomen, which feel like fiberglass or minute cactus spines.

From Los Angeles Times • Oct. 25, 2025

“Of course, being a racist has been illegal in our formation since 1948. The same goes for sexual harassment,” Hegseth offered, possibly to cover his backside, only to expose it again a few sentences later.

From Salon • Oct. 10, 2025

He gave Dodger a slap on the backside, and Akira watched her best friend run away into the woods.

From "Two Degrees" by Alan Gratz

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