/ Dictionary / Index L leptokurtosis: Meaning and Definition of Find definitions for: lep•to•kur•to•sis Pronunciation: (lep"tō-kûr-tō'sis), [key] — n. Statistics. the state of being leptokurtic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. leptokurtic lepton Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language