/ Dictionary / Index L leek: Meaning and Definition of Find definitions for: leek Pronunciation: (lēk), [key] — n. a plant, Allium ampeloprasum, of the amaryllis family, allied to the onion, having a cylindrical bulb and leaves used in cookery. any of various allied species. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: leek (Thesaurus) lee gauge leek-green Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language