/ Dictionary / Index L luna moth: Meaning and Definition of Find definitions for: lu'na moth" Pronunciation: [key] a large, pale-green, American moth, Actias luna, having purple-brown markings, lunate spots, and long tails. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lunacy lunar Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language