Breadcrumb Home > Dictionary > Index P peacenik: Meaning and Definition of Find definitions for: peace•nik Pronunciation: (pēs'nik), [key] — n. Slang (often disparaging) an activist or demonstrator who opposes war and military intervention; pacifist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: peacenik (Thesaurus) peacemaker peace offensive 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: antediluvian Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language