/ Dictionary / Index P polyethylene: Meaning and Definition of Find definitions for: pol•y•eth•yl•ene Pronunciation: (pol"ē-eth'u-lēn"), [key] — n. Chem. a plastic polymer of ethylene used chiefly for containers, electrical insulation, and packaging. Also called, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: polyethylene (Thesaurus) polyethnic polyethylene glycol Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language