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unicycle

American  
[yoo-nuh-sahy-kuhl] / ˈju nəˌsaɪ kəl /

noun

  • unicycles
    plural
  1. a vehicle with one wheel, especially a pedal-driven device kept upright and steered by body balance, commonly used by acrobats and other performers.


verb (used without object)

unicycled, unicycling
  1. to ride a unicycle.

unicycle British  
/ ˈjuːnɪˌsaɪkəl /

noun

  1. Also called: monocycle.  a one-wheeled vehicle driven by pedals, esp one used in a circus, etc

"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

Derived Forms

Inflected Forms

Nouns

Etymology

Origin of unicycle

An Americanism dating back to 1865–70; uni- + cycle

Explanation

You might see a unicyle, or a bicycle-like vehicle with only one wheel, ridden by a clown at the circus. It's harder to ride a unicycle than a bicycle, since you have to balance on a single wheel. Acrobats and other performers often ride unicycles and sometimes even do tricks like balancing on a tightrope while perched on the seat of a unicycle. The Latin prefix uni gives you a clue about the meaning of this word, since it means "one." In unicycle, it's combined with "cycle," which comes from the Greek word kyklos, "circle or wheel."

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Vocabulary lists containing unicycle

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:

Lucas wanted to see a life-size replica of the all-terrain unicycle, so the museum made one, fanged and ferocious.

From Los Angeles Times Sep. 8, 2026

It stocks household items, equipment and tools, as well as some more unusual items including bunting, a unicycle and a popcorn maker.

From BBC Jun. 4, 2026

A man on a unicycle brandished a sign, inspired by J.R.R.

From The Wall Street Journal Feb. 8, 2026

Other days you might see a dog wearing an LED collar or a kid riding an electric unicycle to school and feel momentarily convinced that, yes, the future is actually here.

From Washington Post Sep. 27, 2022

They reached the front of the stage, and Miss Spink leaped nimbly off the unicycle, and the two old women bowed low.

From "Coraline" by Neil Gaiman

They've taught salsa lessons, handed out snacks, and ridden unicycles, as armed law enforcement look on.

From BBC Dec. 27, 2025

On racks behind the school, there are enough bicycles, unicycles and inline skates for every student.

From Los Angeles Times May 8, 2023

The journalist Luke Bailey tweeted images of AI-generated unicycles that were laughably off base.

From Washington Post Mar. 31, 2023

Off road-ready unicycles represent close to 70% of sales at leading retailer Unicycle.com, of which he is general manager.

From Washington Times Oct. 8, 2022

Hoverboards, skateboards, scooters, motorcycles, mopeds, unicycles, tricycles… you name it, we’ve ridden it.

From The Verge Oct. 10, 2019

Based in Michigan, Torrans has unicycled the likes of Pikes Peak’s Barr Trail and the Whole Enchilada, the full-day epic in Moab.

From Washington Times Oct. 8, 2022

He’s been mountain unicycling for more than 15 years.

From Washington Times Oct. 8, 2022

A daredevil geologist finds fitness bliss landing 13-foot drops while unicycling down uneven terrain.

From The Wall Street Journal Aug. 13, 2018

I started unicycling with the rest of my family about 12 years ago, but every week it felt like I was starting all over again, while others progressed.

From The Guardian Dec. 30, 2016

Rollerblading leads to hover boarding which leads to electric unicycling.

From Economist Aug. 11, 2016

Practitioners say unicycling is also good for improved balance and muscle tone.

From New York Times Aug. 28, 2010

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