/ Dictionary / Index L lanternfly: Meaning and Definition of Find definitions for: lan•tern•fly Pronunciation: (lan'turn-flī"), [key] — pl. -flies. any of several large tropical insects of the family Fulgoridae, formerly thought to be luminescent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lanternfish lantern gear Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language