/ Dictionary / Index S sparking plug: Meaning and Definition of Find definitions for: spark'ing plug" Pronunciation: [key] — Brit. Brit. See(def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spark generator sparking voltage Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language