/ Dictionary / Index S spur gear: Meaning and Definition of Find definitions for: spur' gear" Pronunciation: [key] — Mach. Mach. a gear having straight teeth cut on the rim parallel to the axis of rotation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spurge spur gearing Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language