Breadcrumb Home > Dictionary > Index P pacifier: Meaning and Definition of Find definitions for: pac•i•fi•er Pronunciation: (pas'u-fī"ur), [key] a person or thing that pacifies. a rubber or plastic device, often shaped into a nipple, for a baby to suck or bite on. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pacifier (Thesaurus) Pacific tree frog pacifism TrendingHere are the facts and trivia that people are buzzing about. Biographies: Notable Jewish Religious Leaders Current Events This Week: September 2023 Hispanic Population and the 2010 U.S. Census Preamble of the United Nations Charter The Jewish Calendar ✖ Related Content Daily Word Quiz: bildungsroman Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language