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inner tube

American  

noun

  1. a doughnut-shaped, flexible rubber tube inflated inside a tire to bear the weight of a vehicle.


inner tube British  

noun

  1. an inflatable rubber tube that fits inside a pneumatic tyre casing

"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

Etymology

Origin of inner tube

First recorded in 1890–95

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.

Moleli donned a wetsuit, swim cap and goggles and went for a swim in the pothole in a watermelon-adorned inner tube.

From The Wall Street Journal • Oct. 29, 2025

Consider the analogy of trying to capture a 3D image of a child wearing an inner tube around their waist.

From Science Daily • Apr. 22, 2024

Glover said she and her husband, who was at the helm of the pontoon boat towing their son’s inner tube, saw Hubbard racing toward them.

From Los Angeles Times • Jul. 14, 2023

Kile Glover, her 11-year-old son with Bounce TV founder Ryan Glover, died in July 2012 after a personal watercraft struck the boy as he floated in an inner tube on the lake.

From Seattle Times • Jul. 13, 2023

El Hongo listens as his campmates talk about dos and don’ts: Find an inner tube.

From "Enrique's Journey" by Sonia Nazario

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