/ 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 Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language