Breadcrumb Home > Dictionary > Index R reaction formation: Meaning and Definition of Find definitions for: reac'tion forma"tion Pronunciation: [key] — Psychoanal. Psychoanal. a behavioral tendency developed in direct opposition to a repressed impulse. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. reaction engine reaction time 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: catalpa Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language