/ Dictionary / Index A arrow arum: Meaning and Definition of Find definitions for: ar'row ar"um Pronunciation: [key] a North American plant, Peltandra virginica, of wet areas, having large, arrow-shaped leaves and inconspicuous flowers enclosed in a narrow, pointed spathe. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arrow arrowhead Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language