/ Dictionary / Index E expanded plastic: Meaning and Definition of Find definitions for: expand'ed plas'tic Pronunciation: [key] plastic that is made light and spongy by the introduction of pockets of gas or air. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. expanded metal expander Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language