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. 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: empyrean Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language