/ Dictionary / Index P poster paint: Meaning and Definition of Find definitions for: post'er paint" Pronunciation: [key] an opaque, water-based, typically bright-colored paint with a glue-size or gum binder, that is suitable for use on posters and is usually packaged in jars. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. postern post exchange 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