/ Dictionary / Index L lapsus: Meaning and Definition of Find definitions for: lap•sus Pronunciation: (lap'sus Lat. läp's&oobreves), [key] — n. a slip or lapse. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lapstrake lapsus calami* Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language