/ Dictionary / Index U ultracritical: Meaning and Definition of Find definitions for: ul•tra•crit•i•cal Pronunciation: (ul"tru-krit'i-kul), [key] — adj. hypercritical. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ultraconservative ultradian Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language