/ Dictionary / Index L ln: Meaning and Definition of Find definitions for: ln Pronunciation: [key] — Symbol, Math. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. LMT lndry rm Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language