Breadcrumb Home > Dictionary > Index U unthink: Meaning and Definition of Find definitions for: un•think Pronunciation: (un-thingk'), [key] — v., -thought, -think•ing. —v.i. to end one's thought or reverse the process of thought. —v.t. to dispel from the mind: Unthink your thoughts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. unthatch unthinkable TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: loquacious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language