Breadcrumb Home > Dictionary > Index K knock-on effect: Meaning and Definition of Find definitions for: knock'-on' effect" Pronunciation: (nok'on', -ôn'), [key] — Chiefly Brit. Chiefly Brit. a chain reaction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. knockoff knockout 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: anomie Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language