Breadcrumb Home > Dictionary > Index C critical value: Meaning and Definition of Find definitions for: crit'ical val'ue Pronunciation: [key] — Statistics. Statistics. the value of the random variable at the boundary between the acceptance region and the rejection region in the testing of a hypothesis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. critical temperature critical volume TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: temporize Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language