/ Dictionary / Index I inner tube: Meaning and Definition of Find definitions for: in'ner tube" Pronunciation: [key] a doughnut-shaped, flexible rubber tube inflated inside a tire to bear the weight of a vehicle. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Inner Temple inner-tuber Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language