/ Dictionary / Index M milfoil: Meaning and Definition of Find definitions for: mil•foil Pronunciation: (mil'foil"), [key] — n. yarrow (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: milfoil (Thesaurus) Miletus Milford Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language