/ Dictionary / Index L lightboard: Meaning and Definition of Find definitions for: light•board Pronunciation: (līt'bôrd", -bōrd"), [key] — n. switchboard (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. light artillery lightboat Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language