/ Dictionary / Index U unrighteous: Meaning and Definition of Find definitions for: un•right•eous Pronunciation: (un-rī'chus), [key] — adj. not righteous; not upright or virtuous; wicked; sinful; evil: an unrighteous king. not in accordance with right or justice; unfair or unjust: an unrighteous law. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unrighteous (Thesaurus) unrig unrip Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language