/ Dictionary / Index P polythene: Meaning and Definition of Find definitions for: pol•y•thene Pronunciation: (pol'u-thēn"), [key] — n. Chem. Brit. polyethylene. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: polythene (Thesaurus) polytheism polythiazide Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language