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inner tube

noun

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

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Also called tube.

Origin of inner tube

First recorded in 1890–95

Words nearby inner tube

inner sanctum, innersole, inner space, innerspring, Inner Temple, inner tube, inner-tuber, inner-tubing, innervate, innervation, innerve
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for inner tube

inner tube

noun

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