/ Dictionary / Index K key light: Meaning and Definition of Find definitions for: key' light" Pronunciation: [key] (in photography or motion pictures) the main light that illuminates the subject being photographed or filmed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. keyless Key lime Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language