back·​side | \ˈbak-ˌsīd \

Definition of backside 

1 informal

a : the part of the body that a person sits on : buttocks I slid down on my backside, heaving or rowing myself with my arms and using my good leg for steering …— Oliver Sacks

b : the part of the body of a four-legged animal corresponding to the buttocks : rump sense 1a … admits she hit the dog's backside but denies hitting it on the head.— Ann Krueger

2 or back side : the side or surface opposite the front or face of something : the farthest or reverse side : back A tight, rocky couloir drops down the backside of the peak …— Mike Beaudry The guy with the clipboard pulled me over, pointed to an innocuous little knob on the back side of the engine and said it's part of the computer and needs to be replaced.— Tom and Ray Magliozzi

3 or back side

a : the side opposite the homestretch on a racecourse : backstretch When challenged on the backside the final time around, Tudor Palm would have no part of it, and burst to the lead again.— Jackie Burke

b : the part of a playing field or court (as in football or basketball) that is away from where the main action or play is occurring often used before another noun a backside tackle

c : the final 9 holes of an 18-hole golf course The duo had a little trouble on the backside, though, as they bogeyed the par-3 11th hole.— Brian Girasoli

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Examples of backside in a Sentence

our backsides were sore after sitting on those hard benches for so long

Recent Examples on the Web

Zoo curators entered the tamarin habitat Friday morning to a happy surprise: two newborn infants clinging to mother Izzy’s backside. Katherine J. Wu, Smithsonian, "The National Zoo’s Golden Lion Tamarins Delight Curators with the Delivery of Twins," 3 July 2018 After a nice drive on the 18th, his approach went just a tad too long and nestled in some thick grass just on the edge of a backside bunker. Bill Pennington, New York Times, "Dustin Johnson Pulls Away in Round 2 of the U.S. Open," 15 June 2018 From the backside workouts to the grandstand, a look at Louisville's day at the track. Mandy Mclaren, The Courier-Journal, "Sun shines bright for 'Thurby' horse racing fans at Churchill Downs," 3 May 2018 The Trim Twist was a simple board on a metal turning mechanism that invited users to twist their hips back and forth as a way to work out their core, backside and legs. USA TODAY, "The biggest exercise fad the year you were born," 12 July 2018 Now the first three holes of the back nine are par-3s, and the par-33 backside seems more like an executive course. Scott Hanson, The Seattle Times, "Teeing off: The food’s great at historic Jefferson Park Golf Course, but there aren’t many memorable holes," 9 July 2018 To prove how real this cake looked, Wingham posted close-up photos of the cake’s eyes, hair, and backside. Shannon Carlin,, "Would You Eat A Life-Size Kim Kardashian Cake?," 10 Mar. 2018 On the backside of that, there’s a lot of things that happened, but Starlin’s got to be up there telling him to slide. Matthew Defranks,, "A Closer Look: Philadelphia Phillies 2, Miami Marlins 0," 14 July 2018 Umtiti, figuring what the heck after his blunder, unleashes a shot from 30 yards directly into an Australian backside. Christopher Clarey, New York Times, "France Passes First World Cup Test. So Does V.A.R.," 17 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'backside.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of backside

14th century, in the meaning defined at sense 2

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Statistics for backside

Last Updated

10 Nov 2018

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Time Traveler for backside

The first known use of backside was in the 14th century

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More Definitions for backside



English Language Learners Definition of backside

: the part of the body that a person sits on


back·​side | \ˈbak-ˌsīd \

Kids Definition of backside

1 : rump sense 1 … the black pup came toward her, his fat backside swinging as he trotted …— Jean Craighead George, Julie of the Wolves

2 : the part of the body on which a person sits


back·​side | \-ˌsīd \

Medical Definition of backside 

: buttocks often used in plural

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Comments on backside

What made you want to look up backside? Please tell us where you read or heard it (including the quote, if possible).


something that serves to warn or remind

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