/ Dictionary / Index B backing light: Meaning and Definition of Find definitions for: back'ing light" Pronunciation: [key] Also calleda striplight providing diffused illumination for the background of a stage set. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. backing backlash Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language