/ Dictionary / Index L lancet: Meaning and Definition of Find definitions for: lan•cet Pronunciation: (lan'sit, län'-), [key] — n. a small surgical instrument, usually sharp-pointed and two-edged, for making small incisions, opening abscesses, etc. a lancet arch. a lancet window. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lancet (Thesaurus) lance sergeant lancet arch Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language