/ Dictionary / Index A alfalfa: Meaning and Definition of Find definitions for: al•fal•fa Pronunciation: (al-fal'fu), [key] — n. a plant, Medicago sativa, of the legume family, usually having bluish-purple flowers, originating in the Near East and widely cultivated as a forage crop. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: alfalfa (Thesaurus) alfa alfalfa butterfly Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language