Breadcrumb Home > Dictionary > Index C critical region: Meaning and Definition of Find definitions for: crit'ical re'gion Pronunciation: [key] — Statistics. Statistics. the rejection region for the null hypothesis in the testing of a hypothesis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. critical ratio critical state TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: apotheosis Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language