/ Dictionary / Index I idle pulley: Meaning and Definition of Find definitions for: i'dle pul"ley Pronunciation: [key] — Mach. Mach. a loose pulley made to press or rest on a belt in order to tighten or guide it. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. idle gear idler 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