/ Dictionary / Index P polyurethane: Meaning and Definition of Find definitions for: pol•y•u•re•thane Pronunciation: (pol"ē-yoor'u-thān", -yoo-reth'ān), [key] — n. Chem. a thermoplastic polymer containing the group NHCOO: used for padding and insulation in furniture, clothing, and packaging, and in the manufacture of resins for adhesives, elastomers, and fillers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: polyurethane (Thesaurus) polyunsaturated polyuria Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language