/ Dictionary / Index P Plain People: Meaning and Definition of Find definitions for: Plain' Peo"ple Pronunciation: [key] members of the Amish, the Mennonites, or the Dunkers: so named because they stress simple living. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. plain lap plain rail Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language