/ Dictionary / Index P pilot light: Meaning and Definition of Find definitions for: pi'lot light" Pronunciation: [key] Also calleda small flame kept burning continuously, as in a gas stove or furnace, to relight the main gas burners whenever necessary or desired. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pilotless ignition pilot plant Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language