/ Dictionary / Index P plate block: Meaning and Definition of Find definitions for: plate' block" Pronunciation: [key] — Philately. Philately. a block of four or more stamps containing the number or numbers of the printing plate or plates in the margin of the sheet. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Plateau's problem plated Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language