Breadcrumb Home > Dictionary > Index G glow plug: Meaning and Definition of Find definitions for: glow' plug" Pronunciation: [key] — Auto., Mach. Auto.,Mach. a device for each cylinder of a diesel engine with a heating element to heat the incoming fuel and air so that combustion will take place more readily when the engine is cold. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. glow lamp glowworm TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: aphasia Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language