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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:

Scientists discovered that the shape of the underside of the ice shelf strongly affects how seawater circulates below it.

From Science Daily May 10, 2026

They often keep the underside of each slab as it is instead of flattening the bottoms.

From Los Angeles Times Apr. 8, 2026

Max Beier almost put Dortmund ahead in the first half but his effort was deflected by Denis Vavro's last-ditch block onto the underside of the bar.

From Barron's Feb. 7, 2026

United then shocked the home side, taking the lead five minutes into the second half through a superb strike from Patrick Dorgu, who hammered in a shot off the underside of the crossbar.

From BBC Jan. 25, 2026

You didn’t care that the metal sign was crushing—grating—the underside of your car.

From "Thirteen Reasons Why" by Jay Asher

Over two days in July, his team did eight one-hour dives, exploring the undersides of rocky reefs to count the eggs.

From BBC Aug. 29, 2026

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

From Los Angeles Times Dec. 3, 2024

Certain species, like the pythons, have specialized muscles that connect their ribs directly to their skin, allowing them to use just the skin on their undersides to push against the ground and move forward.

From Slate Mar. 8, 2024

Unlike their durable exoskeleton, their undersides, including the legs, are much softer so are rarely fossilized unless the perfect conditions are met.

From Science Daily Dec. 21, 2023

Her returning memory had told her nothing of the way the leaves in summer showed their undersides as a storm approached, then withered and dropped when the nights were chill.

From "Son" by Lois Lowry

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