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Synonyms

underside

American  
[uhn-der-sahyd] / ˈʌn dərˌsaɪd /

noun

  • undersides
    plural
  1. an under or lower side.


underside British  
/ ˈʌndəˌsaɪd /

noun

  1. the bottom or lower surface

"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

Other Word Forms

Noun Inflected Forms


Etymology

Origin of underside

First recorded in 1670–80; under- + side 1


Vocabulary lists containing underside

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.

See Examples For:

On the underside of most children's toys on sale in the US you'll find the same three words – "Made in China".

From BBC ● Oct. 14, 2026

In Grenen, the northernmost point in Denmark, Ms. Korsgaard lies in the sand on her belly to inspect the lyrically named green hairstreak, its wings “jade green on the underside, with a metallic sheen.”

From The Wall Street Journal ● Sep. 11, 2026

Gotham is able to distinguish between the animals largely thanks to "fluke prints": whales have unique patterns on the underside of their tails, similar to human fingerprints, St. Lawrence explained.

From Barron's ● Aug. 18, 2026

To investigate the process, the team combined a highly detailed map of the underside of the Fimbulisen Ice Shelf with a high resolution computer model of the ocean cavity beneath it.

From Science Daily ● May 10, 2026

The House of Perfumers' Le Nez emblem shines brightly on the door—a bouquet of flowers tickling the underside of a nose.

From "The Belles" by Dhonielle Clayton

The spider remains motionless on the undersides of leaves, the same location where Gibellula fungi are commonly found.

From Science Daily ● Jun. 17, 2026

Analysis has shown Punk and Emo had smooth undersides, indicating they likely lived on the seabed.

From BBC ● Jan. 10, 2025

Aescape has heated “hands,” which look like giant pads with touch points on their undersides.

From Los Angeles Times ● Dec. 3, 2024

Laurent Cantet, an eminent director who made penetrating films about the prickly undersides of French life and society, died on April 25 in Paris.

From New York Times ● May 5, 2024

It had rained heavily, and though the rain had stopped, wind still blew, and the leaves of the trees fluttered and revealed their pale undersides.

From "Messenger" by Lois Lowry

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