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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:

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

Niu suffered a broken arm more than a decade ago after falling backwards off her unicycle while practicing.

From Los Angeles Times Jul. 2, 2025

One study found that participants were half as likely to notice a clown on a unicycle — a cheeky touch — while walking and talking on a phone.

From Seattle Times Jan. 28, 2024

Some guys can get away with stink—tall guys, sporty guys, guys who have something else they can be known for, like that guy who learned to unicycle.

From "Wayward Creatures" by Dayna Lorentz

The regulations also cover other electric transportation devices, such as electric unicycles and hoverboards.

From BBC Aug. 8, 2026

You as the actor have to balance — we’re put on unicycles where it’s very real and shockingly narcissistic.

From Los Angeles Times May 24, 2023

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

From Washington Post Mar. 31, 2023

Following this event, we started to notice more e-bikes, e-scooters, and electric unicycles joining our mix of both production and DIY electric skateboards.

From The Verge Aug. 12, 2022

The staff at Rad said, aside from skateboards, scooters, bikes and rollerblades, they have also seen unicycles and even someone in a wheelchair riding and doing tricks in their park.

From Washington Times Dec. 27, 2016

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 opted for the freedom of the road and the greater freedom of mountain unicycling.

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

Rollerblading leads to hover boarding which leads to electric unicycling.

From Economist Aug. 11, 2016

Just to raise the temperature a little, catch our clip of extreme mountain unicycling – it's not just dangerous, it's totally crazy.

From The Guardian Feb. 15, 2013

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

From New York Times Aug. 28, 2010

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