Pronunciation: (pol'ē-es"tur, pol"ē-es'tur),[key] —n. 1. Chem.a polymer in which the monomer units are linked together by the group –COO–, usually formed by polymerizing a polyhydric alcohol with a polybasic acid: used chiefly in the manufacture of resins, plastics, and textile fibers.
2. Also called poly. a fabric made from such textile fibers.