/ Dictionary / Index A arrant: Meaning and Definition of Find definitions for: ar•rant Pronunciation: (ar'unt), [key] — adj. downright; thorough; unmitigated; notorious: an arrant fool. wandering; errant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arrant (Thesaurus) arrangement arras Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language