/ Dictionary / Index T timing belt: Meaning and Definition of Find definitions for: tim'ing belt" Pronunciation: [key] an endless belt bearing teeth for engaging sprockets on two mechanisms requiring precise synchronization. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. timing timing chain Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language