/ Dictionary / Index A aristarch: Meaning and Definition of Find definitions for: ar•is•tarch Pronunciation: (ar'u-stärk"), [key] — n. a severe critic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arista Aristarchus 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