/ Dictionary / Index L Letronne: Meaning and Definition of Find definitions for: Le•tronne Pronunciation: (li-trōn'), [key] — n. a walled plain in the third quadrant of the face of the moon: about 60 miles (100 km) in diameter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. let-out let's Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language