/ Dictionary / Index W wild mustard: Meaning and Definition of Find definitions for: wild' mus'tard Pronunciation: [key] any of several weedy plants belonging to the genus Brassica, of the mustard family, as charlock. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. wild monkshood wild oat Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language