/ Dictionary / Index I idle gear: Meaning and Definition of Find definitions for: i'dle gear" Pronunciation: [key] a gear placed between a driving and a driven gear to transmit motion between them. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. idle idle pulley Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language